Otocinclus hasemani[1] is a species of catfish in the family Loricariidae.

It is native to South America, where it occurs in the Tocantins and Parnaíba basins.

It reaches 2.7 cm (1.1 inches) SL.

[2] It is named for zoologist and explorer John Diederich Haseman.

This Loricariidae article is a stub.