Papers/Abstracts

Austrolebias jaegari (Cyprinodontiformes: Rivulidae: Cynolebiatinae): a new annual fish from the Laguna dos Patos system, southern Brazil, with a redecription of A. gymnoventris (Amato)

Wilson J. E. M. Costa and Morevy M. Cheffe

aqua, International Journal of Ichthyology, pp. 83-88, Volume 6, Issue 2 – November 2002

Abstract

Austrolebias jaegari n. sp. from Pelotas, southern Brazil, is described, and A. gymnoventris (Amato) from Rocha, eastern Uruguay, is redescribed; both species share four synapomorphies: absence of scales on venter, body contact organs of male restricted to anteroventral portion of body side, absence of suborbital and supraorbital dark bars in live specimens, and a unique colour pattern on male body side. Austrolebias jaegari differs from A. gymnoventris by possessing a longer pectoral fin and, in the male, having contact organs on pectoral fin, a more anteriorly positioned anal fin origin, and narrower body bars.

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REFERENCES

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Amato, L. H. 1987. Descripción de Cynolebias cyaneus n. sp., nuevo pez anual del Estado de Rio Grande do Sul, Brasil (Cyprinodontiformes, Rivulidae). Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo, 163: 1-11.

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Costa, W. J. E. M. (in press). Monophyly and phylogenetic relationships of the neotropical annual fish genera Austrolebias and Megalebias (Cyprinodontiformes: Rivulidae). Copeia.

Costa, W. J. E. M. & M. M. Cheffe. 2001. Three new annual fishes of the genus Austrolebias from the laguna dos Patos system, southern Brazil, and a redescription of A. adloffi (Ahl) (Cyprinodontiformes:

Rivulidae). Comunicações do Museu de Ciências e Tecnologia da PUCRS, Série zoologia, 14: 179-200. Hoedeman, J. J. 1958. Rivulid fishes of the Antilles. Studies on the Fauna of Curaçao and other Caribbean Islands, 32: 112-127.

Reichert, J. J. 1994. Laminas y datos complementarios sobre las especies del genero Cynolebias Steindachner 1876, halladas y descritas para el Uruguay, hasta el año 1986. Acuariologia Comunicaciones Ictiologicas, 6: 1-38.

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