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aqua 6(2)_Austrolebias jaegari

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Volume 6, Issue 2 – November 2002

Wilson J. E. M. Costa and Morevy M. Cheffe: Austrolebias jaegari (Cyprinodontiformes: Rivulidae: Cynolebiatinae): a new annual fish from the Laguna dos Patos system, southern Brazil, with a redecription of A. gymnoventris (Amato), pp. 83-88

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Description

SINGLE PAPER

Volume 6, Issue 2 – November 2002

Wilson J. E. M. Costa and Morevy M. Cheffe: Austrolebias jaegari (Cyprinodontiformes: Rivulidae: Cynolebiatinae): a new annual fish from the Laguna dos Patos system, southern Brazil, with a redecription of A. gymnoventris (Amato), pp. 83-88

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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