Pimelodus
Pimelodus is a genus of catfishes (order Siluriformes) of the family Pimelodidae.Pimelodus is a non-monophyletic assemblage; it is defined by a set of non-derived characters. Species level taxonomy of Pimelodus is still poorly known as well as the phylogenetic relationships within and of the genus. The high number of species currently included in Pimelodus, allied to the wide variability in morphology and color pattern of those taxa, pose difficulties for a complete systematic revision of the genus. core group within Pimelodus has been diagnozed that includes P. maculatus, P. blochii, P. coprophagus, P. grosskopfii, P. jivaro, and P. pictus.This classification, like any other taxonomy based on phylogenetic research is in a state of flux. Recent morphological and molecular data has shown that several of these ordinal and higher-level groupings represent evolutionary grades rather than clades. Examples of demonstrably paraphyletic groups include the Paracanthopterygii, Scorpaeniformes, and Perciformes. The listing follows FishBase with notes when this differs from Nelson and ITIS.
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