| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Otocinclus affinis Steindachner, 1877 |
Golden otocinclus | South America | 5 |
| Otocinclus arnoldi Regan, 1909 |
South America | 4.78 | |
| Otocinclus batmani Lehmann A., 2006 |
South America | 3.67 | |
| Otocinclus bororo Schaefer, 1997 |
South America | 3.1 | |
| Otocinclus caxarari Schaefer, 1997 |
South America | 2.6 | |
| Otocinclus cocama Reis, 2004 |
South America | 4.38 | |
| Otocinclus flexilis Cope, 1894 |
South America | 6.8 | |
| Otocinclus hasemani Steindachner, 1915 |
South America | 2.7 | |
| Otocinclus hoppei Miranda Ribeiro, 1939 |
South America | 3.3 | |
| Otocinclus huaorani Schaefer, 1997 |
South America | 3.2 | |
| Otocinclus juruenae Ribeiro & Lehmann A., 2016 |
South America | 3.3 | |
| Otocinclus macrospilus Eigenmann & Allen, 1942 |
South America | 3.5 | |
| Otocinclus mangaba Lehmann A., Mayer & Reis, 2010 |
South America | 2.82 | |
| Otocinclus mariae Fowler, 1940 |
South America | 3.3 | |
| Otocinclus mimulus Axenrot & Kullander, 2003 |
South America | 4.27 | |
| Otocinclus mura Schaefer, 1997 |
South America | 3.6 | |
| Otocinclus tapirape Britto & Moreira, 2002 |
South America | 2.36 | |
| Otocinclus vestitus Cope, 1872 |
South America | 3.2 | |
| Otocinclus vittatus Regan, 1904 |
South America | 3.3 | |
| Otocinclus xakriaba Schaefer, 1997 |
South America | 3.1 |