SciELO - Scientific Electronic Library Online

vol.46 número1Status sistemático del anuro neobatracio calyptocephalella canquelli del terciario medio de la patagonia (argentina) con comentarios sobre la evolución del géneroEstudio paleoxilológico y sedimentológico de la Formación Montaña (Triásico), provincia de Mendoza, Argentina índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados



  • No hay articulos citadosCitado por SciELO

Links relacionados

  • No hay articulos similaresSimilares en SciELO



versión impresa ISSN 0002-7014


BREA, Mariana; BELLOSI, Eduardo  y  KRAUSE, Marcelo. Taxaceoxylon Katuatenkum Sp. Nov. From The Koluel-Kaike Formation (Lower - Middle Eocene), Chubut, Argentina: A Component Of Paleogene Subtropical Forests Of Patagonia. Ameghiniana [online]. 2009, vol.46, n.1, pp. 127-140. ISSN 0002-7014.

This paper describes a silicified trunk fragment, Taxaceoxylon katuatenkum sp. nov., collected from Kilómetro 170 locality, SE of Sarmiento city (Chubut, Argentina). This fossil stem is the second record in Argentina of the Taxaceoxylon genus, and comes from pyroclastic sediments of the Lower - Middle Eocene Koluel-Kaike Formation of central Patagonia. This fossil record indicates that the Taxaceae and/or Cephalotaxaceae families were more widespread in the past than today and that these families were not confined to the Northern Hemisphere. According to the paleobotanical and paleopedological information of the Koluel- Kaike Formation, this new taxon of Taxaceae and/or Cephalotaxaceae would have been a component of the forests developed in humid and warm environments of central Patagonia during the Lower - Middle Eocene. This subtropical flora expanded in South America at mid latitude (47º S), represents the transition between the rainforests and dry forests (megathermal palaeocommunities) during the Early Eocene Climatic Optimum (EECO), and the savannas with palms and grasslands developed by the Middle - Late Eocene.

Palabras clave : Patagonia; Eocene; Fossil wood; Taxaceae or Cephalotaxaceae; Paleoclimate; Koluel-Kaike Formation.

        · resumen en Español     · texto en Español


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License