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Mastozoología neotropical

versão impressa ISSN 0327-9383versão On-line ISSN 1666-0536

Mastozool. neotrop. vol.26 no.2 Mendoza jun. 2019  Epub 19-Out-2019

 

ARTÍCULOS

MAMMALS OF MATO GROSSO, BRAZIL: ANNOTATED SPECIES LIST AND HISTORICAL REVIEW

Mamíferos de Mato Grosso, Brasil: lista anotada e revisão histórica

Marcus Vinicius Brandão1 

Guilherme Siniciato Terra Garbino2 

Thiago Borges Fernandes Semedo3  4 

Anderson Feijó5 

Fabio Oliveira do Nascimento6 

Hugo Fernandes-Ferreira7 

Rogério Vieira Rossi8 

Julio Dalponte9 

Ana Paula Carmignotto10 

1Mastozoologia, Museu de Zoologia da Universidade de São Paulo

2Programa de Pós-Graduação em Zoologia, Laboratório de Mastozoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais

3Laboratório de Mastozoologia, Departamento de Biologia e Zoologia, Instituto de Biociências, Universidade Federal de Mato Grosso

4Programa de Capacitação Institucional, Museu Paraense Emílio Goeldi/Instituto Nacional de Pesquisa do Pantanal, Cuiabá

5Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences

6Mastozoologia, Museu de Zoologia da Universidade de São Paulo

7Laboratório de Conservação de Vertebrados Terrestres (Converte), Universidade Estadual do Ceará

8Laboratório de Mastozoologia, Departamento de Biologia e Zoologia, Instituto de Biociências, Universidade Federal de Mato Grosso

9Instituto para a Conservação dos Carnívoros Neotropicais (PRÓ-CARNÍVOROS)

10Laboratório de Diversidade Animal, Departamento de Biologia, Universidade Federal de São Carlos

Abstract

The state of Mato Grosso is one of the largest (903 357 km.) and most diverse in terms of vegetation in Brazil, encompassing three distinct Neotropical biomes –the Amazon, Cerrado, and Pantanal– therefore holding high faunal diversity. Our goal in this paper was to review the history of mammalogy in this state, and to provide a checklist of mammals, with comments on taxonomy, distribution, conservation status and type of records for the species present in Mato Grosso. These records were based primarily on voucher specimens housed in scientific collections, but a few were based on personal observations and photographs. We listed 268 species belonging to 149 genera, 36 families and 10 orders, which represent 38% of mammal species occurring in Brazil. The most representative families were Phyllostomidae (63 species), Cricetidae (42) and Didelphidae (31). Our list includes 33 threatened species, representing 12% of Mato Grosso mammal species and 30% of all threatened mammal species of Brazil. We discuss the main threats to this group, and argue that social and political projects together with basic scientific knowledge are urgent to ensure a profound change in the current scenario.

Resumo

O estado de Mato Grosso é um dos maiores (903 357 km2 ) e mais diversos do país em termos de fitofisionomias, abrangendo três biomas Neotropicais distintos –Amazônia, Cerrado e Pantanal – apresentando, consequentemente, uma elevada diversidade faunística. Os objetivos do presente estudo foram revisar a história da Mastozoologia neste estado e fornecer uma lista atual de mamíferos com comentários a respeito da taxonomia, distribuição, estado de conservação e tipos de registro para as espécies que ocorrem no Mato Grosso. Os registros aqui obtidos basearam-se, primordialmente, em espécimes-testemunho depositados em coleções científicas, mas algumas espécies foram registradas por observações pessoais e fotografias. Foram registradas 268 espécies pertencentes a 149 gêneros, 36 famílias e 10 ordens, o que representa 38% das espécies de mamíferos do Brasil. As famílias mais representativas foram Phyllostomidae (63 espécies), Cricetidae (42) e Didelphidae (31). Nossa lista inclui 33 espécies ameaçadas, representando 12% das espécies de mamíferos do Mato Grosso e 30% das espécies de mamíferos ameaçados do Brasil. Discutimos as principais ameaças associadas a este grupo e apontamos a importância de projetos sociais e políticos, aliados ao conhecimento científico básico, em promover uma mudança profunda nesse cenário atual.

Palavras-chave Amazônia; Cerrado; História; Mammalia; Pantanal

INTRODUCTION

Among the 6 495 species of mammals in the world (Burgin et al. 2018), 722 (11%) occur in Brazil, making it one of the richest countries in species of mammals (Paglia et al. 2012; Nogueira et al. 2014; Percequillo et al. 2017). This great diversity, however, is still poorly known throughout most of the country, and even basic information, such as lists of mammal species, is lacking for most Brazilian states. Among the 27 Brazilian federative units, only a few have checklists of mammals: Espírito Santo (Moreira et al. 2008), Santa Catarina (Cherem et al. 2004), São Paulo (Vivo 1998; Vivo et al. 2011), Rio de Janeiro (Rocha et al. 2004), Mato Grosso do Sul (Cáceres et al. 2008; Tomas et al. 2017), and Amapá (Silva et al. 2013).

Considering the large Brazilian territory (8 516 000km2), most of these lists are from relatively small (less than 360 000 km2) and well-studied states, and all of them covered, in part, by Atlantic Forest, except Amapá, which is entirely inserted in the Amazon biome. Mato Grosso is the third largest state in Brazil (903 357 km2 ) and encompasses three distinct biomes, including a vast Amazon/Cerrado ecotone and part of the Pantanal, one of the largest wetlands of the world (Veloso et al. 2001; IGBE 2004; Pott & Pott 2004; Marimon et al. 2006). Considering that a checklist of mammals is the first step in order to plan inventories, conduct biogeographic and systematic studies, and develop conservation actions, a review of the mammal fauna of the state is warranted. Our goals in this paper were to review the history of mammalogy in Mato Grosso and provide the first checklist of its mammals, with comments on taxonomy, distribution, conservation status and type of record of the species present in the state.

MATERIAL AND METHODS

Study Site

The Brazilian state of Mato Grosso is a landlocked federative unit located in the middle of South America (7° to 18°S, and 50° to 61°W) represented by three biomes: Amazon, Cerrado and Pantanal, as well as transitional zones (Governo do Estado de Mato Grosso 2017) (Fig. 1).

The Amazon corresponds to 67 111 km2, or approximately 8% of the state area (Fig. 1). Lowland areas, such as depressions, as well as high plateaus up to 1550 m, such as the Serra do Cachimbo, characterize this northern portion of the state. The climate is marked by hot and wet summers that concentrate around 87.5% of the annual precipitation from October to April, with a drier period in the winter (May to September) restricted to one to two dry months (IGBE 1997). The mean rainfall varies from 1800 to 2300 mm, with areas from the northernmost portion reaching values above 2750 mm (Rosa et al. 2007; Marcuzzo et al. 2010).

The Amazon and the Cerrado are adjacent biomes, defining large tracts of transitional areas in South America (ca. 7 950 km) (Ab’Sáber 1977; Dinerstein et al. 1995; Silva 1996). These transitional regions are also known as zones of ecological tension, where mosaics of the Cerrado savanna and the Amazon rainforest influence each other (RADAMBRASIL 1982; Marimon et al. 2006). A large portion of these transitional areas are located in western and northern Mato Grosso (Fig. 1), occupying ca. 413 880 km2, mainly represented by semideciduousdry forests, which display unique characteristics alongthe contact zone (Olson et al. 2001; Veloso et al. 2001; Ivanauskas et al. 2008). The seasonality in this region iswell marked, with a dry season varying from four to sevenmonths, leading to the semideciduous character of theseforests (Marimon et al. 2006; Ivanauskas et al. 2008).

The Amazon Forest, together with these transitional areas, is represented by five distinct ecoregions in Mato Grosso: Interfluvium Madeira/Tapajós, Dry Forests of Mato Grosso, Dry Forests of Chiquitano, Interfluvium Xingu/Tocantins-Araguaia and Interfluvium Tapajós/Xingu, of which the most representative are the ombrophilous forests of the Interfluvium Madeira /Tapajós and the Dry Forests of Mato Grosso (Olson et al. 2001; MMA 2005).

Fig. 1. Map of Mato Grosso, Brazil, showing vegetation types and main rivers (adapted from Olson et al. 2001). Black linesindicate political geographic boundaries. Degrees of southern latitude and western longitude are shown along the leftthandand top margins, respectively. Uppercase are used in all letters in countries names, while for the Brazilian states only in the first letter. River names are in italic. 

Historically, the Cerrado covered 359 847 km2, or 40%of the state territory, located mainly in the depressions of upper Paraguai–Guaporé rivers, the south and south, or 40% of the state territory, located mainly in the depressions of upper Paraguai–Guaporé rivers, the south and southth east of the Parecis plateau, and to the south of the 13 parallel to the border of Mato Grosso do Sul state (Governo do Estado de Mato Grosso 2017) (Fig. 1). The Cerrado is characterized by different physiognomies, including forested areas, such as gallery and seasonally dry forests, as well as open habitats, such as shrublands and grasslands (Ribeiro & Walter 2008). The climate is seasonally well marked, with dry (May to September) and rainy (October to April) seasons (IGBE 1997). The Cerrado is among the 25 world hotspots for conservation due to its high level of endemism, as well as the high threats to its biodiversity (Myers et al. 2000; Mittermeier et al. 2004).

The Pantanal is one of the largest continuous tropical wetlands on Earth, spanning approximately 150 000 km2 , occupying the middle of the upper Rio Paraguai basin and its draining portions in Bolivia, Brazil and Paraguay (IGBE 2004). In Mato Grosso, this biome extends for about 61 102 km2 or 7% of the state area (Governo do Estado de Mato Grosso 2017). The Pantanal has dry (Marchto September) and rainy (October to February) seasons,creating an annual rise and fall of water level that supportsan abundant vertebrate fauna (Junk et al. 2006; Alho 2008).Only a few habitats occupying a minor portion of the entire Pantanal (20–30%) are covered permanently by water orare waterlogged year-long. The remaining area belongsto the aquatic/terrestrial transition zone, which extendsbetween permanently terrestrial and permanently aquatichabitats (Nunes da Cunha & Junk 2009).

Besides the diversity of biomes, the state also harbors one of the largest watersheds in South America, where three hydrographic regions are located: Amazon basin, with 592 382 km2 (65.7% of the state); Paraguai basin, with 176 800 km2 (19.6% of the state); and Tocantins-Araguaia basin, with 132 238 km2 (14.7% of the state), which includes headwaters and rivers that will form some of the most important rivers of the continent, such as the Xingu, Madeira, Tapajós, Araguaia, and Paraguai (Secretaria de Estado de Meio Ambiente 2009).

Data collection

We recorded the species of mammals based primarilyon specimens housed in scientic collections that wereexamined by at least one of the authors: American Museumof Natural History, New York, USA (AMNH); Natural History Museum, London, United Kingdom (BMNH);Coleção de Chiroptera, Departamento de Zoologia da Coleção de Chiroptera, Departamento de Zoologia da Universidade Estadual Paulista “Júlio de Mesquita Filho”, São José do Rio Preto, São Paulo, Brazil (DZSJRP); Coleção de Mamíferos, Universidade Federal de Lavras, Lavras, Brazil (CMUFLA); Field Museum, Chicago, USA (FMNH); Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil (MN); Museu Paraense Emílio Goeldi, Belém, Brazil (MPEG); Museu de Zoologia da Universidade de São Paulo, São Paulo, Brazil (MZUSP); Museu de Zoologia da Universidade Estadual de Campinas, Campinas, Brazil (ZUEC); Museum für Naturkunde, Berlin, Germany (ZMB_MAM); National Museum of Natural History, Smithsonian Institution, Washington DC, USA (USNM); Universidade de Brasília, Brasília, Brazil (UnB);Universidade Federal de Mato Grosso, Cuiabá, Brazil(UFMT); and Universidade do Estado de Mato Grosso, Alta Floresta, Brazil (CZAFMA).

Additional records based on voucher specimens examined by other authors in the literature were also included. When vouchers were not examined by one of us, we cite the reference instead of voucher number. It is therefore possible to verify the identity of any species listed here by either checking the voucher or the cited reference. We also considered records based on personal observations made by one of us (cited in the checklist), as well as based on photos in which the diagnostic characters were unambiguous and readily recognized.

The taxonomy of Didelphimorphia followed Voss & Jansa (2009), updated for Marmosa (Gutiérrez et al. 2010; Rossi et al. 2010b; Voss et al. 2014a; Lima-Silva et al. 2019), Gracilinanus (Semedo et al. 2015), Metachirus (Voss et al. 2019), Monodelphis (Pavan et al. 2012; Voss et al. 2012; Pavan & Voss 2016; Pavan et al. 2017) and Philander (Voss et al. 2018). For Rodentia, we followed Patton et al. (2015), updated for Neacomys (Hurtado & Pacheco 2017; Di-Nizo et al. 2017), Oligoryzomys (Weksler et al. 2017) and Oecomys (Suarez-Villota et al. 2018). For Lagomorpha, the taxonomy follows Ruedas et al. (2017). For Chiroptera, the taxonomy follows Gardner (2008a) updated for Platyrrhinus (Velazco et al. 2010), Natalus macrourus (Garbino & Tejedor 2013), Hsunycteris (Parlos et al. 2014), and Gardnerycteris (Hurtado & Pacheco 2014). The taxonomy of Sturnira is unresolved (Velazco & Patterson 2013), and we provisionally consider only three species occurring in Brazil following Nogueira et al. (2014).

The taxonomic arrangement of Pilosa and Cingulata follows Gardner (2008b), with the following updates: Miranda et al. (2017) for the silky anteaters, Cyclopes; Gibb et al. (2016) for the family classification of Cingulata, using the new arrangments of Chlamyphoridae and Dasypodidae; and Feijó & Cordeiro-Estrela (2016) and Feijó et al. (2018) for the Dasypus kappleri complex. Additionally, we considered Cabassous squamicaudis as a full species (see RESULTS AND DISCUSSION for further explanation). Primate taxonomy follows Schneider & Sampaio (2015) and Garbino & Martins-Junior (2017) for genera and families, and Mittermeier et al. (2013) for species. We consider Pithecia irrorata as the only saki monkey occurring in Mato Grosso (Serrano-Villavicencio et al. 2019). We do not classify the Amazonian Callicebus south of Rio Amazonas in the distinct genus Plecturocebus, as proposed by Byrne et al. (2016); instead, we follow Serrano-Villavicencio et al. (2016) and Garbino & Aquino (2018) in keeping the name Callicebus for all titi monkeys. The capuchin monkeys are classified in the genus Cebus, with the gracile species placed in the subgenus Cebus and the robust species in the subgenus Sapajus, following Feijó & Langguth (2013), Garbino (2015), and Gutiérrez & Marinho-Filho (2017). Carnivora taxonomy follows Wilson & Reeder (2005), updated for Leopardus tigrinus group (Trigo et al. 2013; Nascimento & Feijó 2017), Herpailurus and Puma (Segura et al. 2013; Caso et al. 2015; Kitchener et al. 2017), Leopardus braccatus (García-Perea 1994; Wozencraft 2005; Nascimento 2010), and Conepatus amazonicus (Feijó & Langguth 2013). We followed Duarte & González (2010) for Cervidae taxonomy and Hrbek et al. (2014) for Iniidae taxonomy, treating Inia araguaiaensis as valid and Inia boliviensis as full species. We followed Asher & Helgen (2010) in retaining the name Artiodactyla for the clade that contains the terrestrial artiodactyls and includes Cetacea. We do not consider Tapirus kabomani as a valid species (see further comments in RESULTS AND DISCUSSION) and we agree with Voss et al. (2014b) that compelling data are still needed to corroborate the validity of this species.

We included undescribed species in our list based on previous works, using the same nomenclature as cited in the references of Table 1) (e.g., Suarez-Villota et al. 2018: Oecomys paricola western clade, Oecomys catherinae western clade, Oecomys catherinae westernmost clade, and so forth). Species not identified at the species level in the literature (e.g., Rhagomys sp. in Percequillo et al. 2011) or based on our own analyses (e.g., Cyclopes sp.) were cited as such (sp.). See further comments in the RESULTS AND DISCUSSION for each order.

Conservation status

We retrieved the conservation status of the species based on the most recent assessments of the International Union for the Conservation of Nature (IUCN 2019) and of the Instituto Chico Mendes de Conservação da Biodiversidade, Brazilian Ministry of the Environment (ICMBio 2018). Taxa that were not included in these assessments were classified into two categories:

(1) Not applicable (N/A): For undescribed taxa (e.g., Neacomys sp. in Di-Nizo et al. 2017) and those unidentified at species level (e.g., Rhagomys sp. in Percequillo et al. 2011).

(2) Pending (re)evaluation (P/R): For taxa which conservation status has never been evaluated due to being recently described (e.g., Histiotus diaphanopterus), recently revalidated (e.g., Gracilinanus peruanus) or resulting from a recent taxonomic change, either lumped into a single species (e.g., Guerlinguetus aestuans) or split into two or more species (e.g., Saguinus niger).

RESULTS AND DISCUSSION

Mammalogy in the state of Mato Grosso: the Colonial period (1500–1808)

The first accounts of Brazilian mammals date back to the beginning of the XVI century, as narratives of European travelers to the New World. Most reports came from accessible coastal areas of the country or were restricted to a few hundred kilometers, at most, into the Brazilian interior (Papavero 1971; on the provenance of several specimens was lost (Vanzolini 2004).

Table 1 Checklist of mammals of Mato Grosso, Brazil. Conservation status based on the Brazilian and international lists of threatened species (ICMBio 2018; IUCN 2019). Acronyms: CR = critically endangered, DD = data deficient, EN = endangered, N/A = not applicable, NT = near threatened, P/R = pending (re)evaluation, VU = vulnerable. Acronyms of institutions cited in Material and Methods – Data collection section. Dir. obs. = direct observation. 

Another important but less known naturalist was Joseph Barbosa de Sáa (?–1775), who wrote a book entitled “Dialogos geograficos, chronologicos, politicos, e naturaes” in 1769, that never came to be entirely published. Among many animals, Sáa mentioned small mammals, such as the Brazilian guinea pig (Cavia sp.), the water opossum (Chironectes minimus), the tapeti (Sylvilagus minensis), and several medium and large-sized mammals: the tapir (Tapirus terrestris), brocket deer (Mazama sp.), the giant armadillo (Priodontes maximus), titi monkey (Callicebus sp.), and perhaps the first mention of the southern three-banded armadillo Tolypeutes matacus (Papavero et al. 2009).

The mammals recorded in this period were mostly represented by medium and large-sized species such as monkeys, sloths, armadillos, anteaters, cats, dogs, mustelids, procyonids, deers, peccaries, and large rodents (see table 2 in Hershkovitz 1987).

First half of XIX century (1809–1850)

Fearful of rebellious ideas, the Portuguese Empire maintained an isolationist policy that drove the country into a scientific obscurantism during the colonial period. Even renowned naturalists, such as Alexander von Humboldt, had their entry denied in the Brazilian territory (Papavero 1971). This situation changed in the early XIX century with the fleeing of the Portuguese court to Brazil, triggered by Napoleon’s invasion of Portugal. Upon arriving, prince D. João VI signed a decree declaring the Brazilian ports open to the allied nations, allowing the arrival of many naturalists in Brazil.

In the context of this paper, the most relevant expeditions during this time were those led by Georg Heinrich von Langsdorff, Johann Natterer, and François Louis Nompar de Caumont La Force, comte de Castelnau. These undertakings contributed to the knowledge about the mammal fauna of Mato Grosso by providing scientific specimens, paintings and illustrations, and detailed descriptions on species habitats, natural history, morphology and behavior (Pelzeln 1883; Florence 1977; Vanzolini 1996).

Georg Heinrich von Langsdorff (1774–1852) was the consul of Russia in Brazil when he headed the fluvial expedition that passed through Cuiabá, Mato Grosso, where the group stayed for ten months.

Among his select team, the illustrators Hercules Florence and Aimé-Adrien Taunay (who drowned in the Rio Mamoré) provided important contributions to the knowledge of Mato Grosso mammals (Florence 1977; Vanzolini 2004).

Johann Natterer (1787–1843) is commonly considered the most prolific collector in Brazil during the XIX century. In eighteen years (1817–1835) Natterer’s expeditions collected an impressive number of 1 179 mammal specimens from practically every Brazilian ecosystem (Pelzeln 1883; Vanzolini 1996).

In Mato Grosso, Natterer explored Caiçara (4 km west of Cáceres), Villa Maria (near Cáceres), Cuiabá, Engenho do Capitão Gama (near Vila Bela da Santíssima Trindade, the first state capital), Jacobina (south of Cáceres), Campo do Marco (near Rio Jauru), and Mato Grosso (= Vila Bela da Santíssima Trindade). Natterer died shortly after returning to Vienna, and most of the mammals collected by him were described by Wagner (1842; 1843) and compiled in more detail by Pelzeln (1883). From the lists presented by Wagner (1842; 1843) and Pelzeln (1883) and considering the current usage of taxonomic nomenclature (see Wilson & Reeder 2005; Gardner 2008a; Patton et al. 2015), up to 69 mammal species were recorded in Mato Grosso (see Table S1).

Nineteen nominal taxa of bats, three marsupials, three rodents, one primate and one armadillo have type localities in Mato Grosso. Among these, some represent valid species (see Table S1).

The French naturalist Francis de Castelnau (1810–1880) also traveled in the southwestern portion of Mato Grosso in Cuiabá, Cáceres and Vila Bela da Santíssima Trindade. The zoologist of the expedition, Émile Deville (1824–1853), together with Isidore Geoffroy Saint-Hilaire (1805–1861), described the new monkeys, rodents and cetaceans collected in this region (e.g.,Geoffroy Saint-Hilaire & Deville 1848).

Second half of the XIX century (1880–1900)

During the first half of the XIX century, most of the naturalists who collected mammals in Mato Grosso were of Germanic or French origin, but after this period, England and the USA were more influent in Brazil (Papavero 1971). In the end of 1881, the Museu Nacional (MN) in Rio de Janeiro hired the American naturalist Herbert Huntingdon Smith (1851–1919). The expedition led by Smith, known as the “Naturalist Exploring Expedition”, began in the state of Rio Grande do Sul, southern Brazil, and reached Cuiabá, in Mato Grosso. Smith had to send three to four specimens per species to the MN, and could keep the additional specimens elsewhere. The number of collected mammal specimens sent by Smith to the Philadelphia Academy of Sciences, and to the American Museum of Natural History (AMNH), New York, was around 450. Most of this material was collected in the state of Mato Grosso, where Smith lived for four years (1882–1886).However, there is no information left about the few specimens that stayed in Brazil, most likely dueto the lack of proper conditions to preserve the material at the MN during that period (Kunzler et al. 2011). Fortunately, part of the specimens from Chapada dos Guimarães, Mato Grosso, were studied by Edward D. Cope (1889), who recorded 44 speciesof mammals in the area, and described four newspecies (Table S2). Although most named species are currently treated as synonyms with few valid taxa, such as the Pantanal cat Leopardus braccatus,several nominal taxa are based on this material, suchas a subspecies of collared peccary, Pecari tajacu angulatus (Cope 1889), and kinkajou, Potos avus chapadensis (Allen 1914). Other authors have also studied and published on mammals collected by Smith in Mato Grosso (e.g., Rehn 1901).

Subsequently, British mammalogist Michael Rogers Oldfield Thomas (1858–1929) also described the mammal fauna of Chapada dos Guimarães based on specimens collected by Alphonse Robert in the Percy Sladen Expedition to Central Brazil (1902). In Thomas’ article about the mammals of Chapada dos Guimarães, a total of 35 species were recorded (Thomas 1904; list in Table S3). In the same study, Thomas described four new small mammals, from which three are valid today (Marmosa constantiae, Neacomys amoenus and Oecomys roberti) (see Gardner 2008a; Patton et al. 2015; Hurtado & Pacheco 2017; Lima-Silva et al. 2019); as well as a new porcupine, Coendou centralis (= Coendou prehensilis);a new canid, Canis sladeni (= Lycalopex vetulus),and a new rabbit, Sylvilagus minensis chapadae (= Sylvilagus minensis, considered a junior synonym of S. brasiliensis for a long time, but currently a valid species: see Lagomorpha section). Thomas also provided the first record of the bush dog, Speothos venaticus, for the state. Studying the same material, Dollman (1909) described a new night monkey, Aotus roberti (= Aotus azarae infulatus).

From 1910 to the present

During the previous periods, exploration of the state of Mato Grosso was mostly restricted to its southwestern portion, in areas of the Cerrado and Pantanal biomes. The difficulty to travel terrestrially

During the previous periods, exploration of thestate of Mato Grosso was mostly restricted to itssouthwestern portion, in areas of the Cerrado and Pantanal biomes. The difficulty to travel terrestrially through the Amazon region of Mato Grosso, or to the headwaters of the Aripuanã, Juruena, Teles Pires and Xingu rivers, among others, was due to the presence of unfriendly native tribes, tropical diseases, and the thick jungle present in that yet sparsely-populated area (Sick 1997). Rivers have been the main mean of transportation in the Amazon portion of Mato Grosso until the beginning of XX century. In 1891, the Building Committee of the Telegraph Line was created in Brazil to connect the states of Goiás and Mato Grosso. Between 1898 and 1906, this committee was led by the then Colonel Cândido Mariano da Silva Rondon (1865–1958), who was responsible for the construction of this telegraph line between Cuiabá, Mato Grosso, and Corumbá, currently in the state of Mato Grosso do Sul (Bigio 1996; Maciel 1998). Another expedition under the leadership of Rondon was later conducted from the state of Mato Grosso to the state of Amazonas. In 1913, Theodore Roosevelt, former president of the USA (1901–1908), joined the Rondon Commission in what became known as the Roosevelt-Rondon Expedition (Sá et al. 2008). One of the aims of this expedition was to map the northwestern region of Mato Grosso, especially the still uncharted path of the Rio da Dúvida (=River of Doubt), which was later renamed Rio Roosevelt.

Among the members of this expedition were two zoologists: George Cherrie and Leo E. Miller (1887–1952). Miller’s field notes were essential for describing part of the mammal specimens from this expedition, most of which are now deposited in the AMNH and were studied by Joel Asaph Allen (1838–1921) (Allen 1914, Allen 1916a, 1916b). The Brazilian Alípio de Miranda-Ribeiro (1874–1939), from the MN, also published about the material collected in Mato Grosso by the Roosevelt-Rondon Expedition and during the telegraphic lines construction, in which Miranda-Ribeiro participated, from 1908 to 1909 (Miranda-Ribeiro 1914; Pombal Jr. 2002). Although many of the names given to new species described by Allen and Miranda-Ribeiro are now considered junior synonyms, these authors provided important contributions from the poorly known northwestern Mato Grosso. Moreover, some of the specimens collected in the Roosevelt-Rondon Expedition were recognized as new taxa more than 50 years after they were collected, such as Mico marcai (Alperin 1993), and others were recently revalidated, such as Oligoryzomys utiaritensis and O. mattogrossae (Agrellos et al. 2012; Weksler et al. 2017).

Frederic W. Miller described the mammals collected in two expeditions (1925–1926 and 1928) of the Colorado Museum of Natural History to a region close to Descalvados, southern Mato Grosso, in a huge cattle farm of American and British ownership. Among other contributions on the mammalian fauna of Mato Grosso, Miller gave a new name to the jaguar, Felis ramsayi [= Panthera onca palustris (Ameghino, 1888)] and mentioned that Ozotoceros bezoarticus was “by far the most abundant and typical gamemammal in the chapadão” (Miller 1930: 20).

In 1930, Carlos Octaviano da Cunha Vieira (1897– 1958) became the curator of the mammal collection at the Departamento de Zoologia da Secretaria de Agricultura de São Paulo, which would become the Museu de Zoologia da Universidade de São Paulo (MZUSP). During his curatorial period (1930–1958), the number of specimens in the collection rose from about 2 000 to more than 15 000. Hired naturalists of the museum were responsible for obtaining specimens from Mato Grosso: Ernst Garbe collected in Cáceres in 1917, and José L. Lima and Walter Garbe collected in Cuiabá, Rio Cristalino, Rio das Mortes, Santo Antônio de Leverger and other localities in Mato Grosso in the same period (Pinto 1945). Vieira (1945) published on the mammals from the surroundings of Cuiabá and described a collection from Serra do Roncador (Vieira 1951). In his monograph on Brazilian bats, Vieira (1942) described a molossid from the banks of Rio Juruena, the currently valid species Neoplatymops mattogrossensis. From his checklist of Brazilian mammals, 141 species are listed for Mato Grosso, but these also refer to species from what is nowadays the state of Mato Grosso do Sul.

Aspects of hunting in the Pantanal of Mato Grosso were documented by Aguirre (1945), who listed the game species and discussed the impacts of the commercial exploitation of wildlife skins in the region: 300 862 animal skins, mostly mammals, were exported from Corumbá, Mato Grosso do Sul between 1937 and 1939. In this period, some information regarding game mammals from Mato Grosso were published in non-academic books about hunting (e.g., Vinhaes 1937; Barros-Junior 1947; Siemel 1953).

Decades later, the Royal Society and the Royal Geographical Society of London, in collaboration with the National Museum of Natural History (USNM) and Instituto Evandro Chagas of Brazil, conducted a multidisciplinary field study during the construction of a road connecting Xavantina (today Nova Xavantina), in eastern Mato Grosso, to the Fazenda Suiá Missú, located at Serra do Cachimbo (state of Pará). This became known as the Xavantina-

Cachimbo expedition (1967–1969) (Ratter et al. 1973; Bishop 1974). The base camp of this expedition was situated 260 kilometers north of Xavantina, near Serra do Roncador in northeastern Mato Grosso. This is a relevant area from a botanical and zoological perspective, since it represents a transitional region between the Cerrado and the Amazon (Ratter et al. 1973; Bishop 1974; Ivanauskas et al. 2008). Members of this expedition published the main results concerning the mammal fauna (Pine et al. 1970; Bishop 1974), but other records based on the collected material were published later on (e.g., Bezerra 2011).

A less expressive period in terms of publication of inventories of mammalian fauna of Mato Grosso began in the 1980s. Most additional species records came from isolated publications, not contemplating the whole mammal community of a given area (e.g., Myers & Carleton 1981; Becker 1981; Carleton & Musser 1989; Hershkovitz 1992; Musser et al. 1998; Silva & Yonenaga-Yassuda 1998; Percequillo et al. 2005; 2008; 2011; Santos-Filho et al. 2007; Aragona & Marinho-Filho 2009; Rossi et al. 2010a; Miranda et al. 2011; 2012; Semedo et al. 2011; 2013; Silva & Rossi 2011; Brandão & Nascimento 2015; Garbino et al. 2015; Brandão et al. 2015a; b; 2016; Barbosa et al. 2016; Semedo & Feijó 2016; Suarez-Villota et al. 2018). Some of these new records, however, are based on material housed in scientific collections, especially from UFMT and MZUSP collections, which received precious material from poorly surveyed areas in Mato Grosso in 1983–1984 (“Projeto de Desenvolvimento Integrado do Noroeste do Brasil - Pólo Noroeste) and 1997-1998 ("Diagnoóstico Sócio Econômico Ecológico do Mato Grosso" - SEPLAN 2002)

Species List

We identified 268 mammal species from Mato Grosso (Table 1), classified in the following orders: Didelphimorphia (31), Pilosa (5), Cingulata (9), Chiroptera (99), Primates (25), Carnivora (21), Perissodactyla (1), Artiodactyla (9), Rodentia (68), and Lagomorpha (1) (Fig. S1). The most speciose families are those represented by small mammals, with Phyllostomidae bats presenting 63 species, followed by Cricetidae rodents (42 species) and Didelphidae marsupials (31 species), while most of the other families have less than 11 species recorded in the state (Fig. S2).

Didelphimorphia

A total of 13 genera and 31 species of marsupials occur in Mato Grosso (Table 1), which makes it by far the richest Brazilian state in didelphid species, surpassing São Paulo (22 species), Mato Grosso do Sul (17), Amapá (15), and Rio de Janeiro (14), for example (Rocha et al. 2004; Cáceres et al. 2008; Vivo et al. 2011; Silva et al. 2013; Tomas et al. 2017). The state of Mato Grosso also presents a high number of didelphid species when compared to other countries, such as Argentina (26 species) and French Guiana (15 species), or to other biogeographic regions, such as the Guiana Shield (25 species) (Lim et al. 2005; Flores 2006; Pavan et al. 2012; Voss et al. 2013b; Catzeflis 2017; Rossi et al. 2017). The only South American countries with higher marsupial diversity are Peru, with 41 species (Pacheco et al. 2009; Solari et al. 2012), and Bolivia, with 36 species (Salazar-Bravo et al. 2003; Voss et al. 2004; 2012; Martínez-Lanfranco et al. 2014; Voss et al. 2018). Among the species recorded in Mato Grosso, Cryptonanus agricolai, C. chacoensis, C. unduaviensis, Didelphis albiventris, Gracilinanus agilis, Monodelphis domestica, M. kunsi, Monodelphis cf. sanctarosae and Thylamys karimii are strongly associated to open areas (Carmignotto et al. 2012; Voss et al. 2012), whereas species of Caluromys, Caluromysiops, Chironectes, Glironia, Marmosa, Marmosops, Metachirus and Philander arerelated to the presence of forested habitats, as wellas the species Didelphis marsupialis, Gracilinanusemiliae, G. peruanus, Monodelphis emiliae, M. glirina and M. saci, which are strongly associated to the Amazon forest present in the state (Pavan et al. 2014; Pavan & Voss 2016; Brandão et al. 2014; 2015a; Semedo et al. 2015; Voss et al. 2018).

There are 16 genera and 64 species of marsupials in Brazil (Rossi et al. 2012; Voss et al. 2014b; Semedo et al. 2015; Pavan 2015; Pavan et al. 2017; Voss et al. 2018; Bezerra et al. 2019; Lima-Silva et al. 2019; Pavan 2019) and the number of species will probably increase as taxonomic revisions are carried out. The marsupial fauna of Mato Grosso possibly includes more than 31 species, as many genera are in need of revision (e.g., Caluromys, Chironectes, Cryptonanus, Gracilinanus, Marmosa (Micoureus) and Metachirus [Costa 2003; Voss & Jansa 2009; Fonseca & Astúa 2015; Semedo et al. 2015; Damasceno & Astúa 2016]). In fact, for Cryptonanus agricolai and C. chacoensis, studies of genetic variability have shown that these taxa may represent a complex of cryptic species (Fegies 2014).

Several didelphid species are herein recorded for the first time in the state (Cryptonanus agricolai and C. unduaviensis, Gracilinanus emiliae, Marmosa lepida, Marmosa macrotarsus, Marmosops pinheiroi and Monodelphis cf. sanctarosae), and others have been recently resurrected from synonyms (Gracilinanus peruanus, Philander canus and Metachirus myosuros [see Semedo et al. 2015; Vosset al. 2018; 2019]) or have been recently described (Monodelphis saci, see Pavan et al. 2017).

Finally, several records included in this report come from recently reported range extensions (Caluromysiops irrupta, Chironectes minimus, Glironia venusta and Marmosops ocellatus [Rossi et al. 2010a; Semedo et al. 2013; Brandão et al. 2015a; b; Barbosa et al. 2016]).

Pilosa

Pilosa diversity in Mato Grosso is represented by five species, including all extant genera and families in this order (Table 1). This represents 33% of the species of Vermilingua (anteaters) and 40% of Folivora (sloths) from Brazil. Despite the absence of a vouchered specimen of Bradypus variegatus from the state (see Moraes-Barros et al. 2010), this species was recorded based on a photographed animal crossing a road between two forest patches at Querência (12º11’S; 52º38’W) (Fig. S3). We also did not find any voucher specimen of Cyclopes from Mato Grosso in scientific collections or in literature, but we retrieved a picture of an individual from Paranaíta (9°39’S 56°28’W) (Fig. S4). We were unable to identify the species using this picture because the diagnostic traits (see Miranda et al. 2017) are not visible. The occurrence of Cyclopes rufus in Rondônia is very close to western Mato Grosso, but Cyclopes didactylus, Cyclopes ida, and Cyclopes xinguensis might also be expected given their presence to the north, in the states of Amazonas and Pará (Miranda et al. 2017).

Most of the Pilosa fauna of Mato Grosso is represented by arboreal forest dwellers, such as Bradypus variegatus, Choloepus hoffmanni and Cyclopes sp. While C. hoffmanni and most Cyclopes species are endemic to the Amazon, B. variegatus and Cyclopes didactlylus presents a disjunct distribution in the Amazon and Atlantic Forest, which is an evidence of ancient connection between these two humid forests (Vivo 1997; Feijó & Langguth 2013). The other two anteater species, Myrmecophaga tridactyla and Tamandua tetradactyla, are widespread in Brazil, inhabiting both forested and open habitats (Gardner 2008b).

Similarly to other groups of medium and large mammals, the taxonomy of the order Pilosa remained largely stable in the last century. Most studies focused on ecological aspects, but even basic natural history data are still poorly known for most taxa. Recent unpublished dissertations and theses have unveiled a higher genetic and morphological diversity than previously known (e.g., Ohana 2011; Silva 2013; Clozato 2014). For example, the recent taxonomic revision of the genus Cyclopes revealed an impressive diversity of seven species, previously masked in a widely distributed polytypic taxon (Miranda et al. 2017). Therefore, it is very likely that, in the next years, more changes in the taxonomy of this order will occur.

Cingulata

All genera of armadillos known from Brazil (Paglia et al. 2012) occur in the state of Mato Grosso, comprising nine species (Table 1). The armadillos of Mato Grosso can be divided into three distinct groups based on their habitat selectivity (Anacleto et al. 2006): forest dwellers (Cabassous unicinctus and Dasypus beniensis), open-area dwellers (Tolypeutes matacus), and habitat generalists (C. squamicaudis, C. tatouay, D. novemcinctus, D. septemcinctus, Euphractus sexcinctus and Priodontes maximus).

Cabassous unicinctus has been traditionally treated as a polytypic species represented by two subspecies, C. unicinctus unicinctus and C. unicinctus squamicaudis (Wetzel 1980; Wetzel et al. 2008). The former is considered a forest dweller, occurring mainly in the Amazon forest. Recently, Anacleto et al. (2013) published the first record of this subspecies in a Cerrado area (near the Amazon) in Mato Grosso, but the animal was recorded using a forest corridor along the Rio Verde, which may explain its occurrence in the Cerrado. On the other hand, C. u. squamicaudis has a wider distribution, with records in Amazon and Cerrado areas. These two taxa occur in closely contiguous areas south of the Amazonas river (Pará and Mato Grosso states) with no evidence of potentially interbreeding individuals, which suggests reproductive isolation. Feijó & Langguth (2013) recognized these two subspecies as morphologically distinct and treated them as full species. We provisionally follow their work here, but further studies using both morphological and molecular data are yet needed for the genus.

The occurrence of Cabassous chacoensis in Brazil is controversial. This species was described by Wetzel (1980) and the only putative specimen from Brazil (MACN 4.388) was obtained from the Buenos Aires Zoo in 1904. Despite its label containing just “Brasil”, Yepes (1935) referred to it as from Mato Grosso, information followed by Wetzel in his description. Later, (Wetzel et al. 2008) did not recognize its occurrence in Brazil, with no further explanation. This species is poorly known, with just few records limited to the Gran Chaco of southeastern Bolivia, northern Argentina and western Paraguay (Wetzel 1980; Wetzel et al. 2008). The vegetation within the range of this species is predominantly xeric and similar to that covering the Chaco and Chiquitano Dry Forest in southwestern Brazil (Vasconcelos & Hoffmann 2006; Alves & Sartori 2009), with no evident geographic barriers between them. Therefore, whether this species has already occurred and was extirpated or simply never occurred in Brazil remains open. Thus, we did not include C. chacoensis in Mato Grosso checklist until reliable evidence becomes available.

Recently, Feijó & Cordeiro-Estrela (2016) revised the taxonomy of Dasypus and split D. kappleri into three species: D. beniensis, D. pastasae and D. kappleri, with the first occurring in Mato Grosso. Dasypus beniensis occurs on the right bank of the of Pará, Rondônia and Mato Grosso, in Brazil. The records of Mato Grosso are from Rio Teles Pires, Nova Canaã do Norte and Rio Manso, Chapada dos Guimarães (Feijó & Cordeiro-Estrela 2016; Feijó et al. 2018).

In Mato Grosso, Tolypeutes matacus is the least known armadillo (Feijó et al. 2015a). This species occurs primarily in the dry forests of South America, including Argentina, Paraguay, Bolivia, and western Brazil, where it is known from just five localities, three of them in the state of Mato Grosso (Feijó et al. 2015a; Attias et al. 2016). These few records from the last century suggest that this species could be locally extinct from many areas in its Brazilian original distribution. Alternatively, the scarcity of records could be partially related to the paucity of studies focusing on armadillos in the Pantanal area of Mato Grosso. Future research might uncover new populations in this state, as it occurred in Mato Grosso do Sul (Porfirio et al. 2014; Attias et al. 2016).

Chiroptera

Chiroptera is the most diverse mammal order inthe state of Mato Grosso (Fig. S1), comprising 99 species arranged into 52 genera and eight families (Table 1). It represents 55% of species diversity and75% of genera diversity of Chiroptera from Brazil (Nogueira et al. 2014). The most diverse family in Mato Grosso is Phyllostomidae (63 species), followed by Molossidae (11 species), Vespertilionidae (10 species), Emballonuridae (7 species), Mormoopidae (3 species), Noctilionidae (2 species), Thyropteridae (2 species), and Natalidae (1 species) (Fig. S2).

Seven species were cited for Mato Grosso by Bernard et al. (2011a) but are not included here:

Carollia castanea, Cormura brevirostris, Cynomops paranus, Micronycteris minuta, Molossus pretiosus, Myotis albescens, and Pteronotus parnellii. We did not include these species either because the records were not based on voucher specimens from Mato Grosso (few records are from Mato Grosso do Sul– see references in Bernard et al. 2011a), or the names have been recently synonymized (e.g. Cynomops paranus as a junior synonym of C. planirostris according to Moras et al. 2016).

We have also critically reviewed previous records of Chiroderma salvini (Rocha et al. 2016), Eptesicus andinus (Pine et al. 1970), Micronycteris sanborni (Louzada et al. 2015), Peropteryx trinitatis (Santos et al. 2016), and Vampyressa pusilla (Lima et al. 2016), and do not consider their presence in the state. One of the characters that Rocha et al. (2016) used to diagnose C. salvini is the convergence of the first pair of upper incisors. This character, however, is also present in some specimens of C. villosum (see Taddei & Reis 1980). Moreover, the specimen from Mato Grosso mentioned by Rocha et al. (2016) has a bifid noseleaf tip, exclusive to C. villosum. Ongoing taxonomic revision of the genus carried out by one of the authors (G. S. T. Garbino), including a large sample of both C. villosum and C. salvini, has shown that specimens of C. salvini from Mato Grosso and Rondônia fall within the variation of C. villosum for both qualitative and quantitative characters. We therefore contend that there are no reliable records of C. salvini in Brazil.

The only mention of Eptesicus andinus in Mato Grosso is from Pine et al. (1970), but these authors did not provide voucher numbers or any additional information to support their identification. Likewise, Lima et al. (2016) reported Vampyressa pusilla from the vicinities of Chapada dos Guimarães in Mato Grosso. However, a careful inspection of the cranium is needed to properly ascertain the specimen identity (see Gardner 2008a). As the record of V. pusilla was not vouchered (C.S. Lima pers. comm.), we cannot ascertain the taxonomic identity of the specimens cited in their report. The geographically closest record of V. pusilla is from the central region of Mato Grosso do Sul (Longo et al. 2007).

Louzada et al. (2015) reported the first record of Micronycteris sanborni from Mato Grosso based on two specimens collected at Sesc Serra Azul. However, the diagnostic traits used to identify these specimens are either shared by Micronycteris yatesi or exhibit intraspecific variation (see Siles et al. 2013; Feijó et al. 2015a; b). In fact, the ventral fur coloration of one specimen is pale buff (Louzada et al. 2015: fig. 7), a pattern similar to M. yatesi and distinct from the pure white of M. sanborni (Feijó et al. 2015b). In a similar way, Peropteryx trinitatis was recently reported for Mato Grosso (Santos et al. 2016), but its identification was based on few morphological characters that show intrapopulational variation and are shared with Peropteryx macrotis, as pointed out by Feijó & Rocha (2017). For these reasons, we do not include M. sanborni and P. trinitatis in our checklist.

Instead, we list the record from Louzada et al. (2015) as Micronycteris (Schizonycteris) sp. because it refers to the only record of a pale-venter Micronycteris species (see Porter et al. 2007). The identity of the pale-venter specimens occurring in Mato Grosso awaits further studies.

The systematics, distribution, and ecology of Choeroniscus are still poorly known (Simmons & Voss 1998; Griffiths & Gardner 2008). The most recent checklist of Brazilian bats lists only C. minor for the country (Nogueira et al. 2014), although dubious records of C. godmani have been reported (Presley et al. 2008, see discussion in Nogueira et al. 2014). In Mato Grosso, we found two morphotypes of Choeroniscus, one assigned to C. minor (MZUSP 35006) and another with distinct external and cranial traits that do not match the diagnostic characters of C. minor, here identified as Choeroniscus cf. godmani (MZUSP PEV 0734/735). Therefore, at least two species of the genus are present in Mato Grosso, representing an additional species to Brazil (considering that there are no reliable records of C. godmani for the country). Further studies are needed to clarify the taxonomy of this genus, delimiting its species and their geographic distribution.

Despite the remarkable diversity of bats reported here, Mato Grosso still stands out as one of the Brazilian states with the fewest sampling localities for bats, with records concentrated mostly in the southern and eastern portions of the state (see Bernard et al. 2011b). This scenario, along with an increasing rate of new records for the state (e.g., Louzada et al. 2015; Brandão et al. 2016; Semedo & Feijó 2016; Pedroso et al. 2018), indicates an even higher diversity, especially in the central area, an ecotone between Cerrado and Amazon.

Primates

All families and subfamilies of Neotropical monkeys occur in the state of Mato Grosso, comprising 10 genera and 25 species (see Table 1): nine (36%) Cebidae, nine (36%) Pitheciidae, and seven (28%) Atelidae. This richness encompasses 53% of the genera and 21% of the Brazilian species (Paglia et al. 2012). The most speciose primate genus in Mato Grosso is Callicebus, with six species, including the recently described C. grovesi (Boubli et al. 2019).

Callicebus pallescens, which occurs in northwestern Mato Grosso do Sul and adjacent areas in Bolivia and Paraguay, may also occur in southwestern Mato Grosso, but the Rio Paraguai may be a geographic barrier to its dispersal northwards (Hershkovitz 1990).

We can find four genera in the Amazon basin of Mato Grosso that have recently colonized Central America, i.e. Ateles, Cebus (Cebus), Saimiri and Saguinus (Rosenberger et al. 2009); three genera endemic to the Amazon basin, i.e. Lagothrix, Pithecia and Chiropotes; and widespread genera that successfully colonized drier, more seasonal ecosystems in South America, i.e. Alouatta, Aotus, Callicebus and Cebus (Sapajus) (Lynch-Alfaro et al. 2015). The Amazonian genus Mico represents a special case, as only one of the 14 species, Mico melanurus, is widespread in drier, seasonal habitats (Vivo 1991).

The Cerrado and Pantanal areas of the state are within the range of Alouatta caraya, the most widespread species of this genus (Gregorin 2006). The same habitats are occupied by Cebus cay, Mico melanurus and Aotus azarae azarae. In Brazil, the southernmost record of Mico melanurus is in the Urucum range, a forested area in the Pantanal biome, in the northwestern portion of Mato Grosso do Sul. This species also occurs in south and southwestern Mato Grosso and in the headwaters of Amazonian rivers, such as the Sucunduri, in southern Amazonas, close to the border with Mato Grosso (Vivo 1991; Noronha et al. 2008). As mentioned before, the southwestern portion of the state was the most intensively sampled along the years, and for this reason, these four species of primates were recorded early on in the state (Geoffroy Saint-Hilaire 1812; Pelzeln 1883; Thomas 1904; Miranda-Ribeiro 1914).

The Amazonian component of Mato Grosso primate fauna has two distinct elements that are congruent with two of the centers of vertebrate endemism in the Amazon: the Rondônia and Xingu areas (Cracraft 1985; Ribas et al. 2012; Lynch-Alfaro et al. 2015). To the west, elements from the Rondônia endemism center, such as Callicebus bernhardi, C. cinerascens and Saimiri ustus, are evident. Alouatta puruensis (from the “seniculus” group) and Ateles chamek are restricted to the northern and northwestern portion of the state, although the former reaches as far south as the Rio Jaurú (Miranda-Ribeiro 1914; Gregorin 2006). By contrast, on the left bank of Rio Xingu to the northeast, we find Alouatta discolor (from the “belzebul” group) and Ateles marginatus (Gregorin 2006). On the right bank of Rio Xingu, we confirm the occurrence of Alouatta belzebul based on individuals observed at Santa Terezinha (9°51’S 50°25’W) and Vila Rica (10°00’S 51°06’W) by the authors (G. S.T. Garbino and A. P. Carmignotto).

Two species are endemic to the AripuanãRoosevelt interfluvium–Mico intermedius and the recently described Callicebus miltoni (Hershkovitz 1977; Dalponte et al. 2014). On the headwaters of the expansive Amazonian rivers running northwards from the Brazilian highlands, there are records of Amazonian species that would otherwise be absent from the drier regions in southern and southeastern Mato Grosso, such as Callicebus vieirai and Mico emiliae (Garbino 2011; Gualda-Barros et al. 2012). Saguinus niger has been recently recorded for the Amazon-Cerrado ecotone in the northeastern portion of Mato Grosso (Garbino et al. 2015).

Regarding the taxonomic status of species recorded in Mato Grosso, we question the validity of Pithecia mittermeieri Marsh, 2014. This author treated specimens of Pithecia from Mato Grosso as P. mittermeieri, a new taxon distinct from P. irrorata Gray, 1843–the taxon previously known to occur in Mato Grosso (see Hershkovitz 1987). Nonetheless, after examining Pithecia skins from Mato Grosso (MN 3313, MN 3316; UFMT 602; USNM 545891) and Madre de Dios, Peru (FMNH 93534, FMNH 98040), we concluded that these populations do not differ from what has been proposed by Marsh (2014) to represent P. irrorata (restricted by her to Peru and western Brazilian Amazon). Our analysis agree with Serrano-Villavicencio et al. (2019), who carried out a taxonomic revision of the Pithecia irrorata complex and concluded that Pithecia mittermeieri, P. rylandsi, and P. pissinatti are junior synonyms of P. irrorata.

The primate fauna of the Amazon region of Mato Grosso is still poorly known, as attested by recently described species (Gualda-Barros et al. 2012; Dalponte et al. 2014; Boubli et al. 2019), and new distributional notes (e.g., Sampaio et al. 2012; Garbino et al. 2015; Gusmão et al. 2017). It is likely that species that were recorded from adjacent areas in the states of Amazonas, Mato Grosso do Sul, Pará and Rondônia, i.e., Callicebus pallescens, Mico humilis, Mico marcai and Mico mauesi (Ferrari et al. 2000; Noronha et al. 2008; Gregorin & de Vivo 2013; Garbino 2014) will eventually be recorded in Mato Grosso.

Carnivora

The state of Mato Grosso harbors five of the seven families of Carnivora that occur in Brazil (Paglia et al. 2012) (Table 1). Altogether, 17 genera and 21 species are found in Mato Grosso, which represent 74% of genera and 60% of species diversity of the Carnivora from Brazil (Paglia et al. 2012; Nascimento & Feijó 2017).

All Carnivora species recorded in Mato Grosso have large areas of geographic distribution in Brazil, and most of them are also found in other parts of the Neotropics (Eisenberg 1989; Emmons & Feer 1997; Eisenberg & Redford 1999; Nowak 1999). Two species (10%) are essentially forest dwellers occurring within the Amazon biome: Atelocynus microtis and Potos flavus. Four species (19%) are typical inhabitants of open areas, occurring essentially in the Cerrado and the Pantanal: Chrysocyon brachyurus, Lycalopex vetulus, Conepatus amazonicus (listed as C. semistriatus in ICMBio and IUCN Red Lists), and Leopardus braccatus (listed as L. colocolo in ICMBio and IUCN Red Lists). Most species (71%) are habitat generalists, occurring in both forest and open habitats: Cerdocyon thous, Speothos venaticus, Nasua nasua, Procyon cancrivorus, Eira barbara, Galictis vittata, Lontra longicaudis, Pteronura brasiliensis, Herpailurus yagouaroundi, Leopardus emiliae, L. guttulus, L. pardalis, L. wiedii, Puma concolor and Panthera onca (Carmignotto et al. 2012; Paglia et al. 2012; Nascimento & Feijó 2017).

Furthermore, some species, such as C. thous, N. nasua, P. cancrivorus, C. amazonicus and E. barbara, tolerate human modified landscapes, such as agricultural and deforested areas, pastures, and habitats near human dwellings (Presley 2000; Courtenay & Maffei 2004; Beisiegel & Campos 2013; Cavalcanti et al. 2013). But other species, like A. microtis, P. brasiliensis, and P. onca, are more sensitive to human disturbance and have specific habitat requirements, thus prefering non-disturbed sites (Morato et al. 2013; Rodrigues et al. 2013). The Amazonian weasel (Mustela africana) may also be present in the state of Mato Grosso. Some studies (Eisenberg & Redford 1999; Rodrigues 2013; Ramírez-Chavez et al. 2014) indicate a geographic range for the species that includes Mato Grosso, but we are unaware of any photographic record or voucher specimen of the Amazonian weasel from Mato Grosso, and thus field studies are needed to confirm its presence in the state.

Perissodactyla

One species of Perissodactyla, Tapirus terrestris, occurs in Mato Grosso (Table 1), representing the only species of this order in Brazil (Paglia et al. 2012). Tapirus terrestris occurs in all biomes of Mato Grosso, both in open and forested areas. The lowland tapir has lost 14% of its original distribution in Brazil (Taber et al. 2007). Only 20% of the populations are likely to survive in a long term in the Cerrado, where the species lost about 67% of its territory and it is therefore regionally classified as Endangered (EN) (Médici et al. 2012). In the Pantanal, this species is classified as Near Threatened (NT), and its annual rate of habitat loss is 0.47% (Médici et al. 2012). Even in the Amazon, where it is considered as Least Concern (LC), Bodmer et al. (1997) estimate that the species can be extinct in 150 years. Although the species occupies a wide variety of habitats throughout its area of occurrence, Brooks et al. (1997) suggest that T. terrestris prefers rainforests with palm trees, wetlands and seasonally flooded areas.

It is important to mention that a new species of tapir, Tapirus kabomani, was recently described from Brazil, with records in the states of Amazonas, Rondônia and Mato Grosso (Cozzuol et al. 2013). Nevertheless, the validity of this species has been questioned (see Voss et al. 2014b) and remains in discussion (Cozzuol et al. 2014). We believe that additional compelling evidence is needed to attest the validity of this taxon since the data presented by Cozzuol et al. (2013; 2014), although based on different lines of evidence (genetics, morphometrics, discrete morphology, morphological phylogeny, and folk taxonomy), do not discard the possibility that T. kabomani specimens represent geographic variants of T. terrestris. Thus, we provisionally treat T. terrestris as the only tapir in Mato Grosso.

Artiodactyla

Mato Grosso harbors two of the three families of terrestrial Artiodactyla that occur in South America: Tayassuidae (with two genera and two species) and Cervidae (three genera and five species) (Table 1).

These seven species represent 70% of the terrestrial Artiodactyla richness in Brazil (Paglia et al. 2012). There are also two species of cetaceans (Iniidae), the only fully aquatic mammals that occur in the state.

Most of the terrestrial taxa aforementioned are widely distributed in Brazil, such as Pecari tajacu, Tayassu pecari, Mazama americana, and M. gouazoubira (Duarte 1997; Eisenberg & Redford 1999; Wilson & Reeder 2005). The first three species occur in the Amazon, Atlantic Forest, Cerrado, Caatinga, and Pantanal. Mazama gouazoubira occurs in all Brazilian biomes, except the Amazon, where it is replaced by Mazama nemorivaga, which is probably endemic to this biome (Pinder & Leeuwenberg 1997; Rossi 2000).

Recent studies based on molecular data have pointed out that Mazama is a polyphyletic group (Duarte et al. 2008; Gutiérrez et al. 2017), with specimens treated as M. americana, M. bororo, M. nana, M. pandora, M. rufina and M. temana recovered in the same clade of specimens of Odocoileus. On the other hand, specimens of M. gouazoubira and M. chunyi grouped with Blastocerus, Hippocamelus, Ozotoceros and Pudu,while specimens of M. nemorivaga were recoveredin a distinct clade. In addition, M. americana and M. nemorivaga may represent species complexes (Duarte et al. 2008; Gutiérrez et al. 2017). Thus,species richness whitin Mazama might change inthe future, resulting in changes in species numberin Mato Grosso.

Ozotoceros bezoarticus lost most of its original range and is currently concentrated in the Cerrado biome, mainly in Mato Grosso (Duarte et al. 2012). Similarly, the historical range of Blastocerus dichotomus covered most of the country and all biomes (Tomas et al. 1997), but its current distribution is fragmented, with most residual populations (approximately 36 000 individuals) concentrated in the Pantanal of Mato Grosso and Mato Grosso do Sul, with small populations in the wetlands of Rondônia, Tocantins, Paraná and São Paulo (Pinder & Seal 1995; Mauro et al. 1998; Duarte et al. 2012), with a recent record from Minas Gerais (Prist et al. 2014).

Among the species of Cervidae, B. dichotomus and O. bezoarticus prefer open areas (Mauro et al. 1998; Mourão et al. 2000; Andriolo et al. 2003), but the former occurs mainly in wetlands and feeds on aquatic and semi-aquatic plants while the latter can be also found in dry fields and agricultural properties (Tomas & Salis 2000; Tomas et al. 2013). On the other hand, species of Mazama are typical of forested habitats, but some (e.g., M. gouazoubira) can be recorded in open areas as well (Pinder & Leeuwenberg 1997; Gayot et al. 2004).

We also emphasize the presence of massive populations of the exotic invasive species Sus scrofa (Suidae) in Mato Grosso (Deberdt & Scherer 2007; Pedrosa et al. 2015), with four main morphotypes. The feral domestic pig or “porco-monteiro”, has its origin in the first domestic pigs introduced into the wild throughout the Brazilian midwest, probably due to the release of animals in the wild during the Paraguayan War over 150 years ago (Desbiez et al. 2011). Today, its largest populations are concentrated in the Pantanal of Mato Grosso and Mato Grosso do Sul. The second is the wild boar or “javali”, introduced in southern Brazil from Uruguay in the late 1980’s (Deberdt & Scherer 2007). The manipulated breed of wild boar with domestic pigs resulted in a third morphotype, a feral pig known as “javaporco”. In addition, typical domestic pig has also been recently introduced into native areas. In the Amazon portion of Mato Grosso, it is known as "porco-alongado" (Fernandes-Ferreira 2014). Currenlty, these non-native populations of S. scrofa have dominated the Pampas biome and expanded northwards into the Amazon, Atlantic Forest, Cerrado, and Caatinga (Deberdt & Scherer 2007; Pedrosa et al. 2015), and already occupies over 60% of Mato Grosso (Pedrosa et al. 2015).

Two confirmed species of cetaceans are present in Mato Grosso, Inia boliviensis and I. araguaiaensis (Table 1). The first is found in the Amazon basin, and two of us (A. P. Carmignotto and M. V. Brandão) observed individuals in the Rio Guaporé, near Vila Bela da Santíssima Trindade, western Mato Grosso. Inia araguaiaensis, formerly considered a population of I. geoffrensis, but recently recognized as a full species (Hrbek et al. 2014), occurs in the AraguaiaTocantins basin. Two individuals of I. araguaiaensis, a female and its fetus, were collected in 1949 in the Rio das Mortes, and are housed in the MZUSP. A third species, I. geoffrensis, is probably present in Mato Grosso (Aripuanã-Roosevelt interfluvium), but we are unaware of any voucher specimens. Field observations or vouchers are needed to confirm its presence in Mato Grosso.

Rodentia

Three main groups of rodents occur in South America: the squirrels of the suborder Sciuromorpha; the caviomorphs, composed of spiny rats, New World porcupines, cavies, capybaras, among others of the suborder Hystricomorpha; and the mouse and rat-like rodents of the suborder Myomorpha, which are represented by the family Cricetidae, and mostly by the subfamily Sigmodontinae (Patton et al. 2015). The most recent compilations indicate 76 genera and 248 species of rodents in Brazil (Paglia et al. 2012; Percequillo & Gregorin 2018), a number already outdated due to the recent recognition of additional species (e.g., Pardiñas et al. 2016; Brandão et al. 2017; Percequillo et al. 2017; Rocha et al. 2018; Suarez-Villota et al. 2018). In Mato Grosso, Rodentia is the second largest order of mammals, following Chiroptera (Fig. S1). We compiled 38 genera and 67 species of rodents–five squirrels, 20 caviomorphs, and 42 sigmodontines–reaching about 27% of the species of rodents from Brazil.

Several small rodents from Mato Grosso present most of its geographic range whitin the Amazon Forest (see Voss & Emmons 1996; Patton et al. 2000; Voss et al. 2001; Patton et al. 2015; Abreu-Júnior et al. 2016), with new and undescribed species of Akodon, Neacomys and Oecomys (see Table 1) restricted to this biome in Mato Grosso. There are also many unrevised taxa that may represent species complexes, such as Euryoryzomys macconnelli, Oecomys bicolor, O. catherinae, O. paricola, O. roberti, and Rhipidomys leucodactylus (see Patton et al. 2000; Voss et al. 2001; Costa 2003; Costa et al. 2011; Patton et al. 2015; Suarez-Villota et al. 2018). Although most of these undescribed species are sigmodontine rodents, a few caviomorphs, especially spiny-rats (Echimyidae) are in need of thorough revision, such as Dactylomys, Isothrix, Makalata, Mesomys and Proechimys (see Patton et al. 2000; Voss et al. 2001; Emmons et al. 2015). Squirrels have been recently reviewed taxonomically (Vivo & Carmignotto 2015), but they are probably one of the least studied groups of rodents in South America, given that virtually nothing is known about the ecology, systematics and karyology of most species. Thus, additional species of squirrels might be present in Mato Grosso, especially in Amazonian areas, where this group reaches its maximum diversity in South America (see Vivo & Carmignotto 2015).

The diversity of open-area dwellers is alsohigh among Mato Grosso rodent species. Thefauna of the Cerrado and Pantanal includes Calomys spp., Cerradomys spp., Gyldenstolpia planaltensis, Kunsia tomentosus, Oligoryzomys chacoensis, O. mattogrossae, Oxymycterus delator,Pseudoryzomys simplex, Thalpomys cerradensis, Cavia aperea, Galea cf. spixii, Ctenomys nattereri,C. rondoni, Carterodon sulcidens, Clyomys laticeps,and Thrichomys pachyurus. Nonetheless, most of these species are also present in neighboring forested areas in transitional and borderline regions. There is an endemic component strongly associated with open areas, notably in the Cerrado (Carmignotto et al. 2012; Gutiérrez & Marinho-Filho 2017), represented by the genera Carterodon, Gyldenstolpia, Kunsia, and Thalpomys. The Pantanal has no endemics, and suffers stronger biogeographical influence from adjacent areas (see Werneck 2011), sharing several species with the Cerrado (Carmignotto et al. 2012).

Most of the medium to large rodents in Mato Grosso, such as Hydrochoerus, Cuniculus, Dasyprocta, and Coendou, represent widespread species that lack robust taxonomic studies. For instance, there are no published large-scale systematic studies involving Cuniculus and Hydrochoerus. Others, like Coendou, remain poorly sampled in Mato Grosso, despite recent taxonomic attention (e.g., Voss & da Silva 2001; Voss 2011; Voss et al. 2013a), or “is clearly provisional”, such as Dasyprocta taxonomy, as atested by the most recent published effort (Patton & Emmons 2015). We cannot therefore rule out the existence of new or unreported species of these larger rodents in Mato Grosso, especially in the Amazonian portion, as this large area still remains poorly investigated. This fact is reinforced by the record of Coendou cf. nycthemera in the Amazonian region of Mato Grosso (Paranaíta) in the present study, which is the first record of this species in the state, based on a study skin without skull (CZAF MA 10).

Lagomorpha

The lagomorphs are represented in South America by the genus Sylvilagus, which extend from eastern Mexico to northern Argentina (Nowak 1999). Only one species (S. brasiliensis) with 21 subspecies had traditionally been recognized (Hoffman & Smith 2005), until recent studies suggested that some of these taxa should be recognized as full species (Bonvicino et al. 2015; Ruedas 2017; Ruedas et al. 2017). At least three species of Sylvilagus occur in Brazil (Ruedas et al. 2017)–S. brasiliensis, S. tapetillus and S. minensis, and we provisionally treat the tapetis present in Mato Grosso as Sylvilagus minensis (Table 1). Ruedas et al. (2017) restricted S. brasiliensis and S. tapetillus to northeastern and southeastern Atlantic Forest, respectively, and considered S. minensis Thomas, 1901 as the name available for populations from other areas to the south of the Amazon.

Conservation

Mato Grosso has 33 species listed under some threat category (see Table 1) for CR, EN and VU categories) according to international (IUCN 2019) and Brazilian red lists (ICMBio 2018). These numbers represent 12% of the mammal richness of Mato Grosso and 30% of all threatened mammals of Brazil. Carnivora has the largest number of threatened species (11), followed by Primates (8). In Mato Grosso, species under threat pending (re)evalution represent about 10% (ICMBio) and 12% (IUCN), those data deficient 7% (ICMBio and IUCN), and the ones near threatened 2% (ICMBio) and 5% (IUCN). Thus only 66% of the species recorded are considered as least concern (Fig. S5).

Habitat loss and fragmentation represent the major threats to Brazilian mammals (Costa et al. 2005) and this is also true for the state of Mato Grosso. Historical and ongoing deforestation have led to the extirpation of important ecosystems (Ferraro & Figueirôa 2017). Areas in the state of Mato Grosso represented 35% of the 37 million hectares deforested in the Brazilian Amazon between 2001 and 2009 (MDIC 2012), and up to 30% of deforestation of the entire Brazilian Cerrado between 2002 and 2009 (Rocha et al. 2011). The increased investment in the production of soy and beef to be exported to China, associated with the relaxing of environmental laws, are the main reasons for the observed loss (Fearnside et al. 2013). Other causes include logging, mining, construction of dams, and the continuous use of fire by traditional communities for agricultural purposes (Klink & Machado 2005; Junk et al. 2006; Soares-Filho et al. 2006; Lees & Peres 2008; Ferreira et al. 2014).

Besides habitat loss, medium and large-sized mammals are also affected by hunting (Costa et al. 2005; Fernandes-Ferreira 2014). Peres & Nascimento (2006) reported 743 individuals of 21 species of mammals hunted for subsistence during 20 months by the Kayapó indigenous community located between the states of Pará and Mato Grosso. Mammals represented 86.3% of the roughly 13 700 kg of bushmeat consumed by the Kayapó, and the number of harvestsensitive prey species showed clear evidence of local depletion (Peres & Nascimento 2006). Yet, carnivores, cervids and peccaries are persecuted by farmers because of the predation of crops, pastures, cattle herds, and domestic animals (Desbiez et al. 2012; Fernandes Ferreira 2014; Tortato et al. 2015). The most representative species related to these conflicts are Panthera onca and Puma concolor, which frequently cause damage to local livestock (Marchini & MacDonald 2012). Nevertheless, the state of Mato Grosso has been an important place for the development of conservation strategies to reduce this problem. Losses of herds in the northern Pantanal are related to several factors such as seasonal water level, age of predators and preys, and proximity to forested areas (Tortato et al. 2015). Understanding these factors is crucial for establishing management strategies that may reduce conflicts. In addition, regional losses caused by jaguars on cattle herds could be rewarded by a system of voluntary payments from willing tourists in the same region. This suggestion is supported by the fact that the annual income generated by the jaguar ecotourism (US$ 6.8 million) are 56 times higher than the revenue caused by the predation of herds per year (Tortato et al. 2017).

Roadkill rates of mammals in Mato Grosso are still poorly studied, but the available evidence indicates a large environmental problem: for example, 41 species and 3.63 individuals were killed per kilometer along 63 km of a federal highway in Cáceres (Melo & Santos-Filho 2007). Although we are not aware ofstudies focusing on conservation of aquatic and semiaquatic mammals in Mato Grosso, top predators suchas Lontra longicaudis, Pteronura brasiliensis, and Inia spp. can be threatened due to water pollution, a problem that persists due to agricultural pesticides and mercury emissions from mining areas (?Dores et al. 2008; Moreira et al. 2012). Alien species are an old and constant threat in Brazil. Feral pigs (Sus scrofa) are causing significant negative impacts on agriculture, livestock, and environment, strongly affecting the local income in the past 200 years (Sicuro & Oliveira 2002; Alho et al. 2011; Pedrosa et al. 2015). Unsurprisingly, their impacts are not restricted to the economy: populations of S. scrofa in the Pantanal have similar habitat requirements and feeding strategies with the native peccaries, Pecari tajacu and Tayassu pecari (Sicuro & Oliveira 2002).

Due to these facts, lethal control is allowed by the federal government (normative instruction 03/2013). On the other hand, traditional hunting of the “porcomonteiro” in the Pantanal led to a reduced hunting pressure on native species (Desbiez et al. 2011). It is still important to emphasize the presence of other introduced mammals in the state such as dogs, cats, domestic mice and rats (Alho et al. 2011), whose impacts to the local mammals have not yet been studied.

All these factors reported here are responsible for a severe scenario of defaunation, with effects that can be extended to impacts on evolutionary patterns, seed dispersal, agricultural pest control, human health, water quality, and decomposition and nutrient cycling (Barnosky et al 2011; Galetti & Dirzo 2013). This set of threats in Mato Grosso becomes more serious when we consider that the state shelters two–Cerrado and Mato Grosso Dry Forests–of the 13 ecoregions with highest conservation priority for mammals in Brazil (Alves & Brito 2013). Thus, social and political projects based on robust scientific studies, aiming to protect and conserve mammals and all wildlife are urgent to ensure a profound change in this scenario.

There are currently several studies combining ecological, management, economical, political and social backgrounds to point out effective conservation strategies to mitigate environmental impacts (e.g., Junk et al. 2006; Marchini & MacDonald 2012; Tortato et al. 2015; 2017).

The Mato Grosso red list is a fundamental tool to map the local impact on threatened species. Promoting taxonomic and ecological studies, especially those focusing on “Data Deficient” species, is crucial, as they can bring new information, which might be useful in evaluating the risk of extinction, as well as defining appropriate conservation and management strategies for such a biologically diverse state.

Supplementary materials

Supplement 1Table S1Mammals collected by Johann Natterer during 1825–1829 in the district of "Cuyabá" (showing the presentday localities in the state of Mato Grosso), as listed by Wagner (1842, 1843) and Pelzeln (1883).Supplement 2Table S2Mammals collected around “thirty miles to the north-eastward [from Cuyaba, in] the little village of Chapada” (= Chapada dos Guimarães) in the “Naturalist Exploring Expedition”, as listed by Cope (1889).Supplement 3Table S3Mammals collected in “Santa Anna de Chapada, a village situated at an altitude of about 800 m., on the Serra do Chapada, some thirty miles N.E. of Cuyabá” (= Chapada dos Guimarães) by Alphonse Robert in the Percy Sladen Expedition, as listed by Thomas (1904).Supplement 4Figure S1Number of species per Order of mammals from Mato Grosso, Brazil.Supplement 5Figure S2Number of species per Family of mammals from Mato Grosso, Brazil.Supplement 6Figure S3Bradypus variegatus from Querência, Mato Grosso. Photo by Diego Queirolo and Graziela DottaSupplement 7Figure S4Cyclopes sp. from Paranaíta, Mato Grosso. Photo by Rodrigo I. T. Branco.Supplement 8Figure S5Percentage of mammal species from Mato Grosso, Brazil, according to ICMBio (2018) and IUCN (2019) classification of threatened species and other categories (Not applicable and Pending reevaluation) used in the present study. The two Aotus subspecies present different classification of threat (see Table 1), so they were treated separately here.

Acknowledgments

We are grateful to the following curators and collection managers for permitting access to examine specimens under their care: Robert Voss (AMNH), Roberto Portela (BMNH), Mendelson Guerreiro de Lima (CZAFMA), Mario de Vivo, Luis Fábio Silveira and Juliana Gualda (MZUSP), Eliana Morielle Versute (DZSJRP), Renato Gregorin (CMUFLA), Bruce D. Patterson (FMNH), João Alves de Oliveira and Sergio Maia Vaz (MN), Ivan Sazima and Karina Rebelo (ZUEC), Frieder Mayer and Christiane Funk (ZMB_MAM), Linda Gordon (USNM), Suely Marques-Aguiar and José de Sousa e Silva Junior (MPEG), and Jader Marinho-Filho (UNB). This study was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP #2010/03969-4 to MVB and #2011/20022-3 to APC); Fundação de Amparo à Pesquisa do Estado de Mato Grosso (FAPEMAT #567000/2008 and #477017/2011 to RVR); and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq #552032/2010-7 to RVR, coordinated by CY Nagamachi; #457444/2012-6 to APC, coordinated by LF Silveira). TBFS and GSTG were supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPES. AF is supported by the Chinese Academy of Sciences Presidents International Fellowship Initiative (Grant N°2018PB0040). TSBF is supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and the Ministério da Ciência, Tecnologia, Inovações e Comunicações (MCTIC) through the scholarship (process 300659/2019-9). HF-F is grantee of the Instituto Serrapilheira. AF, FON and TBFS received the Collection Study Grant from the AMNH and TBFS received the Ernst Mayr Grant from the Museum of Comparative Zoology, Harvard University. We thank Robert Voss for the identification of Coendou cf. nycthemera, Rodrigo Ian Teixeira Branco for the picture of Cyclopes, Diego Queirolo and G. Dotta for the picture of Bradypus variegatus, José Eduardo Serrano-Villavicencio for the information on Pithecia taxonomy and Leandro P. Godoy for valuable discussions about mammals from Mato Grosso. Finally, we are also grateful to Y. Leite and two anonymous reviewers, for critically commenting on earlier versions of this contribution.

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B312 Voss, R. S., & S. A. Jansa. 2009. Phylogenetic relationships and classification of didelphid marsupials, an extant radiation of New World metatherian mammals. Bulletin of the American Museum of Natural History 322:1–177. https://doi.org/10.1206/322.1Links ]

B313 Voss, R. S., D. P. Lunde, & N. B. Simmons. 2001. The mammals of Paracou, French Guiana: A Neotropical lowland rainforest fauna part 2. Nonvolant species. Bulletin of the American Museum of Natural History 263:1–236. https://doi.org/10.1206/0003-0090(2001)263<0003:tmopfg>2.0.co;2 [ Links ]

B314 Voss, R. S., T. Tarifa, & E. Yensen. 2004. An Introduction to Marmosops (Marsupialia: Didelphidae), with the description of a new species from Bolivia and notes on the taxonomy and distribution of other Bolivian forms. Bulletin of the American Museum of Natural History 3466:1–40. https://doi.org/10.1206/00030082(2004)466<0001:aitmmd>2.0.co;2 [ Links ]

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B316 Voss, R. S., C. Hubbard, & S. A. Jansa. 2013a. Phylogenetic Relationships of New World Porcupines (Rodentia, Erethizontidae): Implications for Taxonomy, Morphological Evolution, and Biogeography. American Museum Novitates 3769: 1–36. https://doi.org/10.1206/3769.2Links ]

B317 Voss, R. S., B. K. Lim, J. F. Díaz-Nieto, & S. A. Jansa. 2013b. A new species of Marmosops (Marsupialia: Didelphidae) from the Pakaraima Highlands of Guyana, with remarks on the origin of the endemic Pantepui Mammal Fauna. American Museum Novitates 3778:1–27. https://doi.org/10.1206/3778.2Links ]

B318 Voss, R. S., E. E. Gutiérrez, S. Solari, R. V. Rossi, & S. A. Jansa. 2014a. Phylogenetic relationships of mouse opossums (Didelphidae, Marmosa) with a revised subgeneric classification and notes on sympatric diversity. American Museum Novitates 3817:1–27. https://doi.org/10.1206/3817.1Links ]

B319 Voss, R. S., K. M. Helgen, & S. A. Jansa. 2014b. Extraordinary claims require extraordinary evidence, a comment on Cozzuol et al. (2013). Journal of Mammalogy 95:893–898. https://doi.org/10.1644/14-mamm-a-054Links ]

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Recibido: 17 de Abril de 2018; Aprobado: 19 de Octubre de 2018