Aguarunichthys
Aguarunichthys is a genus of long-whiskered catfishes native to South America. Species. There are currently three recognized species in this genus: Etymology. "Aguarunichthys" is derived from "Aguaruna", the name of a society of people from where "A. torosus" was collected, as well as "ichthys", meaning "fish". The species name of "A. torosus" is derived from the Latin "brawny" or "muscular" for its body form. "A. tocantinsensis" is named for the Tocantins River from which it was first collected. "A. inpai" is a latinization of the National Institute of Amazonian Research (INPA). Distribution and habitat. "A. inpai" inhabits the  middle Amazon River basin in Brazil, "A. tocantinsensis" originates from the Tocantins River basin in Brazil, and "A. torosus" is known from the Cenepa River basin of the Amazon River drainage in Peru. "A. tocantinsensis" has been found in areas with strong currents and rocky bottom. On the other hand, "A. inpai" inhabits areas where the riverbed consists of sediments. These fish species are rarely captured and are unknown to the local fishermen; this may be due to their deep-bottom dwelling habits. Description. "Aguarunichthys" was originally described due to the distinctive finger-like projections of the gas bladder. There  are three pairs of barbels, one pair of long maxillary barbels and two pairs of shorter chin barbels. "A. inpai" has small spots on a cream-coloured body, while the other two species have large darker spots on an olive-brown body. "A. torosus" appears more elongate (it has a longer distance between its dorsal fin and adipose fin) and has a smaller eye than "A. tocantinsensis". These species reach about 30–40 centimetres (12–16 in) SL.