only a single genus, Nematogenys, which
contains a single species, N. inermis.
The genus is endemic to some rivers in Chile.
The common name for this species is "Mountain
Catfish". Previously in the Trichomycteridae
family with Nematogenys as the subfamily
name and as such is very rare in the aquatic
was a fossil which was found and described from
the Miocene, continental fluviolacustrine deposits
of the upper Cura–Mallín Formation
(37–39°S), Chile (Azpelicueta &
Rubilar, 1997). This species was named as Nematogenys