Vertebrate Zoology 60(2): 123-138, doi:

Description of Dicrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes: Cichlidae), two new cichlid species from the Rio Negro and the Rio Tapaj\xc3\xb3s, Amazon drainage, Brazil

Uwe Römer^‡, Ingo Hahn, PABLO M. Vergara

‡ Universität Triercom, Triercom, Germany

Corresponding author: Uwe Römer ( eu.roemer@t-online.de )

This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Citation: Römer U, Hahn I, Vergara PM (2010) Description of Dicrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes: Cichlidae), two new cichlid species from the Rio Negro and the Rio Tapaj\xc3\xb3s, Amazon drainage, Brazil. Vertebrate Zoology 60(2): 123-138

Abstract

Dicrossus foirni sp. n. and Dicrossus warzeli sp. n. are described from the Brazilian Amazon River system. Both species are differentiated from all other Neotropical cichlids by exhibiting three rows of longitudinal lateral spots. Dicrossus foirni sp. n., which is distributed in the northern Rio Negro drainage, exhibits a pattern of lateral spots formed by the clustering of individual dots. By contrast, Dicrossus warzeli sp. n., which is endemic to the Rio Tapajós, exhibits three longitudinal rows of horizontal dash-like spots on the sides of the body. Furthermore, the two species are distinguished by having different relationships between body height and body length.

Keywords

Systematics, ichthyology, biogeography, freshwater ecology, Neotropics, Amazon River, new taxa.