Potamarius

Potamarius is a genus of sea catfishes. The three species in this genus exclusively inhabit fresh water in southern Mexico and Guatemala. The individual species have relatively small ranges.^[1] The highly endangered Paragenidens grandoculis of Brazil was long classified in Potamarius, but a 2019 study has found it to belong in its own genus.^[2]

Potamarius
Potamarius nelsoni
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Siluriformes
Family:	Ariidae
Subfamily:	Ariinae
Genus:	Potamarius C. L. Hubbs & R. R. Miller, 1960
Type species
Conorhynchos nelsoni Evermann & Goldsborough 1902
Species
See text for species.

Species

There are currently three described species in this genus:^[1][2]

• Potamarius izabalensis C. L. Hubbs & R. R. Miller, 1960
• Potamarius nelsoni (Evermann & Goldsborough, 1902) (Lacandon sea-catfish)
• Potamarius usumacintae Betancur-R. & Willink, 2007 (Usumacinta sea-catfish)