A new species of Inpaichthys from the rio Canamã, rio Aripuanã basin, Mato Grosso State, Brazil, with a redefinition of the genus (Characidae: Stethaprioninae)

Abstract

Abstract A new species of Inpaichthys is described from a tributary of the rio Canamã, rio Aripuanã basin, Mato Grosso State, Brazil. The new species can be diagnosed from its congeners by the color pattern in life and by morphometric and meristic features. A comprehensive phylogenetic analysis of the Characidae, conducted to assess the generic placement of the new species, revealed that Hasemania nambiquara is also a member of Inpaichthys and thus transferred to this genus. A monophyletic group composed of the three known species of Inpaichthys is hypothesized to be related to Nematobrycon and a clade composed of Carlana, Pseudochalceus, and Rhoadsia, among the taxa herein analyzed. A diagnosis for Inpaichthys and morphometric and meristic data of I. kerri are also presented.

Keywords

• Hasemania nambiquara
• Inpaichthys kerri
• rio Madeira basin
• Phylogeny
• Taxonomy