Tribe Hypoptopomatini Acestridium Hypoptopoma Lampiella Macrotocinclus Niobichthys Otocinclus Oxyropsis Tribe Otothyrini (sometimes elevated to subfamily as Otothyrinae) Corumbataia Epactionotus Eurycheilichthys Hisonotus Microlepidogaster Otothyris Otothyropsis Parotocinclus Pseudotocinclus Pseudotothyris Schizolecis incertae sedis Chauliocheilos [1] Gymnotocinclus Plesioptopoma [2] Rhinolekos [3] The Hypoptopomatinae are a subfamily of catfishes (order Siluriformes) of the family Loricariidae,[4] composed of 17 genera and approximately 80 species.

[4] However, in a 2005 analysis, Otothyrini was found to not be monophyletic, with its representatives comprising a paraphyletic group in relation to the tribe Hypoptopomatini.

[8] Problematically, the most recent hypoptopomatine genera, Gymnotocinclus and Rhinolekos, were not classified in either of the tribes.

[10] Hypoptopomatinae are distributed east of the Andes in South America from Venezuela to northern Argentina.

[5] Most of the hypoptopomatine species are usually found at or near the water surface, typically in close association with riverbank vegetation or some subsurface structure.