A new species of Ancistrus (Siluriformes: Loricariidae) from Tapajós and Xingu basins, Brazil

Abstract A new Ancistrus species is described from Tapajós and Xingu river basins. It distinguished its congeners by the singular body color pattern, consisting of dark vermiculated stripes almost all over body, also combination features as a narrow head, large internostril distance, absence rows enlarged odontodes on lateral plates. In addition, that inhabit rio basin presence fully-developed adipose fin (vs. absent in parecis A. tombador, vestigial or krenakarore). differs ranunculus, Xingu, smaller size, gill opening, narrower cleithral width. The taxon adds record to list shared among