New species of Phenacorhamdia (Siluriformes: Heptapteridae) from the Xingu River basin
Silva, Gabriel S. C; Ochoa, Luz E; Castro, Íthalo S.
Neotrop. ichthyol
; 20(2): e210143, 2022. tab, graf
Artículo
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| VETINDEX | ID: biblio-1375960
Heptapteridae is a diverse group of catfishes composed of 231 valid species endemic to the Neotropical region, recognized in two subfamilies Rhamdiinae and Heptapterinae. Phenacorhamdia is a Heptapterinae member and currently has 13 valid species broadly distributed throughout the main river basins of South America. Here we described a new species of Phenacorhamdia from the Xingu River basin. Morphological data were obtained from 30 specimens under 23 morphometric measures and 6 meristic counts. The new species differs from congeners based on the exclusive combination of the following diagnostic characters atypical mottled colored body and all fins with interradial membranes mottled pigmented; multicuspid teeth; maxillary barbel reaching pectoral-fin origin; lacking a short extension of the first pectoral-fin ray; caudal fin lobes extremely elongated and pointed; and 43−45 total vertebrae.(AU)
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