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Revista de la Sociedad Entomológica Argentina

versión impresa ISSN 0373-5680versión On-line ISSN 1851-7471

Rev. Soc. Entomol. Argent. v.64 n.3 San Miguel de Tucumán ago./dic. 2005

 

The subgenus Stilobezzia (Eukraiohelea) in Argentina and Paraguay (Diptera: Ceratopogonidae)

El subgénero Stilobezzia (Eukraiohelea) en la Argentina y Paraguay (Diptera: Ceratopogonidae)

Spinelli, Gustavo R. and Carla G. Cazorla

División Entomología, Museo de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina; e-mail: spinelli@fcnym.unlp.edu.ar

RESUMEN. Se registra por primera vez para la Argentina a Stilobezzia (Eukraiohelea) amnigena (Macfie) y a Stilobezzia (E.) elegantula (Johannsen) para la Argentina y Paraguay. Se reconoce a Stilobezzia subsessilis Kieffer como sinónimo menor de S. elegantula.

PALABRAS CLAVE: Stilobezzia (Eukraiohelea). Argentina. Paraguay. Nuevos registros. Sinonimia.

ABSTRACT. Stilobezzia (Eukraiohelea) amnigena (Macfie) is recorded for the first time from Argentina, and Stilobezzia (E.) elegantula (Johannsen) from Argentina and Paraguay. Stilobezzia subsessilis Kieffer is recognized as a junior synonym of S. elegantula.

KEY WORDS: Stilobezzia (Eukraiohelea). Argentina. Paraguay. New records. Synonymy.

Predaceous midges of the genus Stilobezzia Kieffer are common inhabitants of aquatic environments but are often overlooked because of their small size (1- 3 mm) (Wirth & Spinelli, 1992). Borkent & Wirth (1997), in their World catalog of Ceratopogonidae, mentioned four subgenera of Stilobezzia: the cosmopolitan Acanthohelea Kieffer and Stilobezzia Kieffer, with more than 300 described species; Debenhamia Wirth and Grogan, known by two Australian species; and Eukraiohelea Ingram and Macfie, with 14 described species from Africa, America and southeastern Asia.

The subgenus Stilobezzia (Eukraiohelea) is presently known in America by four species: S. (E.) amnigena (Macfie), distributed from southeastern USA to northeastern Brazil, doubtly in Jamaica and Puerto Rico; S.(E.) dorsofasciata (Lutz), from Rio de Janeiro, Brazil; S. (E.) elegantula (Johannsen), from USA to Panamá, doubtly in Puerto Rico; and S. (E.) subsessilis Kieffer, from Paraguay. According to its original description, the later is very similar to S. (E.) elegantula. However, in the revision of the New World species of the subgenus (Wirth & Spinelli, 1992), and due to the lack of material from Paraguay and the wide gap in distribution from that of S. elegantula, S. subsessilis was regarded as species inquirenda, not as a junior synonym.

The purpose of this paper is to report findings of S. (E.) amnigena and S. (E.) elegantula in northeastern Argentina and/or neighbouring sites of Paraguay, significantly enlarging the distribution of both species, and to propose the synonymy of S. (E.) subsessilis under S. (E.) elegantula. Accurate descriptions and illustrations of both species may be found in Wirth & Spinelli (1992).

Stilobezzia (Eukraiohelea) amnigena (Macfie)

Eukraiohelea amnigena Macfie, 1935: 56 (female; Brazil).

Stilobezzia (Eukraiohelea) amnigena: Lane & Forattini, 1958: 203 (comb.; Jamaica); Lane & Forattini, 1961: 84 (in key); Wirth & Spinelli; 1992: 346 (redescr.; distr.).

Stilobezzia (Eukraiohelea) elegantula, in part, misident: Wirth, 1953: 62 (male descr.; figs.); Wirth & Grogan, 1981: 78 (male descr.; figs.).

Distribution. U.S.A (Florida, South Carolina), ? Jamaica, ? Puerto Rico, Brazil (Maranhão), Argentina (Corrientes).

New Records. ARGENTINA: Corrientes, Ituzaingó, 22-V- 1996, G. Spinelli, CDC light trap.

Remarks. The examined male, unless damaged, clearly shows typical characters of S. amnigena: tergite 9 with apicolateral processes, distal portion of parameres long, slender and separate from basal apodemes, and gonostylus stout, swollen in mid portion.

Stilobezzia (Eukraiohelea) elegantula (Johannsen)

Bezzia elegantula Johannsen, 1907: 109 (female; U.S.A., Kansas).

Probezzia elegantula: Malloch, 1914: 137 (comb.).

Parabezzia elegantula: Malloch, 1915: 359 (comb.).

Parabezzia (Eukraiohelea) elegantula: Johannsen, 1934: 345 (notes; status).

Eukraiohelea elegantula: Johannsen, 1943: 781 (comb.).

Stilobezzia (Eukraiohelea) elegantula: Wirth, 1953: 62 (in part, female; comb.; redescr.; distr.); Wirth & Grogan, 1981: 78 (in part, female; redescr.; figs.); Wilkening et al., 1985: 525 (in part, female; Florida records); Wirth & Spinelli, 1992: 343 (redescr.; distr.).

Stilobezzia (Eukraiohelea) maculitibia: Lane & Forattini, 1956: 207 (female, male; Panama); Lane & Forattini, 1961: 84 (in key); Wirth & Spinelli, 1992: 344 (syn.).

Stilobezzia subsessilis Kieffer, 1917: 311 (female; Paraguay); Lane & Forattini, 1961: 88 (subgeneric position); Wirth & Spinelli, 1992: 348 (sp. inquer.). NEW SYNONYM.

Distribution. U.S.A (Kansas and Louisiana to Maryland and Florida), Panamá, ? Puerto Rico, Paraguay (Itapua), Argentina (Chaco, Misiones).

New Records. ARGENTINA: Chaco. Parque Nacional El Chaco, 11/13-X- 1982, G. Spinelli, 1 male, at light; Misiones: Posadas, 7-III- 2001, G. Spinelli, 1 female, CDC light trap; PARAGUAY. Itapua, Aguapey, 10/11-V- 2000, A. Ortiz-D. López, 1 male, CDC light trap; same data except 10-VIII- 2000, G. Spinelli, 1 male; same data except 1/2-XI-2001, 1 female, 1 male.

Remarks. The detailed examination of the specimens here reported allows us to recognize that their characters are identical to the ones used by Kieffer (1917) in the original description of S. (E.) subsessilis, and consequently that this species is a junior synonym of S. (E.) elegantula. The type of S. (E.) subsessilis, formerly deposited in the Musée National Hongrois de Budapest, was destroyed by fire.

LITERATURE CITED

1. BORKENT, A. & W.W. WIRTH. 1997. World species of biting midges (Diptera: Ceratopogonidae). Bull. Amer. Mus. Nat. Hist. 233, 257 pp.         [ Links ]
2. JOHANNSEN, O.A. 1907. Some new species of Kansas Chironomidae. Kansas Univ. Sci. Bull. 4: 109-112.         [ Links ]
3. JOHANNSEN, O.A. 1934. New species of North American Ceratopogonidae and Chironomidae. J. N. Y. Ent. Soc. 42: 343-352.         [ Links ]
4. JOHANNSEN, O.A. 1943. Two new species of American Ceratopogonidae (Diptera). Ann. Ent. Soc. Amer. 36: 761-762.         [ Links ]
5. KIEFFER, J.J. 1917. Chironomides d'Amérique conservés au Musée National Hongrois de Budapest. Ann. Hist. -Nat. Mus. Nat. Hungarici 15: 175-228.         [ Links ]
6. LANE, J. & O.P. FORATTINI. 1956. Neotropical Stilobezzia Kieffer, 1911 I. Nine new Panamanian species (Diptera, Nematocera, Ceratopogonidae). Rev. bras. Malariol. 8: 207-226.         [ Links ]
7. LANE, J. & O.P. FORATTINI. 1958. Neotropical Stilobezzia II. Fourteen new species, chiefly from Panama (Diptera, Ceratopogonidae). Rev. bras. Entomol. 8: 203-224.         [ Links ]
8. LANE, J. & O.P. FORATTINI. 1961. Neotropical Stilobezzia, 1911 III. Key for the the adults of this genus and description of one new species (Diptera, Ceratopogonidae). Rev. bras. Entomol. 10: 83-94.         [ Links ]
9. MACFIE, J. W.S. 1935. Ceratopogonidae (Dipt.) from the river Amazon. Stylops 4: 49-56.         [ Links ]
10. MALLOCH, J.R. 1914. Synopsis of the genus Probezzia, with description of a new species. Proc. Biol. Soc. Wash. 27: 137-140.         [ Links ]
11. MALLOCH, J.R. 1915. The Chironomidae, or midges, of Illinois, with particular reference to the species occurring in the Illinois river. Bull. Ill. St. lab. Nat. Hist. 10: 275-543.         [ Links ]
12. WILKENING, A.J., D.L. KLINE & W.W. WIRTH. 1985. An annotated checklist of the Ceratopogonidae (Diptera) of Florida with a new synonymy. Fla. Ent. 68: 511-537.         [ Links ]
13. WIRTH, W.W. 1953. Biting midges of the heleid genus Stilobezzia in North America. Proc. U. S. Nat. Mus.103: 57-85.         [ Links ]
14. WIRTH, W.W. & W.L. GROGAN. 1981. Natural History of Plummers Island, Maryland XXV. Biting midges (Diptera: Ceratopogonidae). 3. The species of the tribe Stilobezziini. Bull. Biol. Soc. Wash. 5: 1-102.         [ Links ]
15. WIRTH, W.W. & G.R. SPINELLI. 1992. American predaceous midges of the subgenus Eukraiohelea of Stilobezzia (Diptera: Ceratopogonidae). Fla. Ent. 75: 342-349.         [ Links ]

Recibido: 30-VI-2005
Aceptado: 30-IX-2005

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