NEMATOGENYS INERMIS

'''Nematogenys inermis''' is a kind of catfish, and the only extant species in the family 'Nematogenyiidae'. This fish originates from fresh water in central Chile. Fishes of the World, , Joseph, S., Nelson, John Wiley & Sons, Inc., 2006,
The body is naked (without scales) and elongate. There are three pairs of barbels: chin (mental) barbels, maxillary barbels, and nasal barbels. There is no adipose fin. The opercle lacks spines.
Nematogenyidae and Trichomycteridae are sister groups that together form a clade that is sister to the families Callichthyidae, Scoloplacidae, Astroblepidae, and Loricariidae.^[1]
One extinct species, ''Nematogenys cuivi'', has been described in this genus.

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References

References

1. On the osteology and myology of the cephalic region and pectoral girdle of ''Nematogenys inermis'' (Ghichenot, 1848), with comments on the autapomorphies and phylogenetic relationships of the Nematogenyidae (Teleostei : Siluriformes), , Rui, Diogo, Belg. J. Zool.,