Abstract
A new species of Moenkhausia (Characiformes, Characidae) from the Içá River, Amazon Basin, northern Brazil
Highlights
Eigenmann (1903) proposed the genus Moenkhausia to accommodate Tetragonopterus xinguensis Steindachner, 1882
The genus is widespread in the Neotropical river systems, with its greatest diversity occurring in the Amazon Basin (Eigenmann 1917, Lima et al 2003)
During a taxonomic study of M. grandisquamis (Müller & Troschel, 1845) and M. xinguensis (Steindachner, 1882), we verified the existence of an undescribed species, very similar morphologically to the formers, which is formally described
Summary
Eigenmann (1903) proposed the genus Moenkhausia to accommodate Tetragonopterus xinguensis Steindachner, 1882. During a taxonomic study of M. grandisquamis (Müller & Troschel, 1845) and M. xinguensis (Steindachner, 1882), we verified the existence of an undescribed species, very similar morphologically to the formers, which is formally described Given such similarity, the lack of phylogenetic definition for the genus, and the fact that the new species bears all the still used traditional generic diagnostic features (see Eigenmann 1903, Eigenmann 1917), we conservatively allocate our new species in Moenkhausia
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