n = 38
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Otocinclus affinis | Steindachner, 1877 | Otocinclus affinis | Loricariidae | Golden otocinclus |
| Otocinclus arnoldi | Regan, 1909 | Otocinclus arnoldi | Loricariidae | |
| Otocinclus batmani | Lehmann A., 2006 | Otocinclus batmani | Loricariidae | |
| Otocinclus bororo | Schaefer, 1997 | Otocinclus bororo | Loricariidae | |
| Otocinclus caxarari | Schaefer, 1997 | Otocinclus caxarari | Loricariidae | |
| Otocinclus cephalacanthus | Miranda Ribeiro, 1911 | Otothyris lophophanes | Loricariidae | Brown sucker catfish |
| Otocinclus cocama | Reis, 2004 | Otocinclus cocama | Loricariidae | |
| Otocinclus depressicauda | Miranda Ribeiro, 1918 | Hisonotus depressicauda | Loricariidae | |
| Otocinclus fimbriatus | Cope, 1894 | Otocinclus flexilis | Loricariidae | |
| Otocinclus flexilis | Cope, 1894 | Otocinclus flexilis | Loricariidae | |
| Otocinclus francirochai | Ihering, 1928 | Hisonotus francirochai | Loricariidae | |
| Otocinclus gibbosus | Miranda Ribeiro, 1908 | Lampiella gibbosa | Loricariidae | |
| Otocinclus hasemani | Steindachner, 1915 | Otocinclus hasemani | Loricariidae | |
| Otocinclus hoppei | Miranda Ribeiro, 1939 | Otocinclus hoppei | Loricariidae | |
| Otocinclus huaorani | Schaefer, 1997 | Otocinclus huaorani | Loricariidae | |
| Otocinclus joberti | Vaillant, 1880 | Hypoptopoma gulare | Loricariidae | |
| Otocinclus juruenae | Ribeiro & Lehmann A., 2016 | Otocinclus juruenae | Loricariidae | |
| Otocinclus laevior | (Cope, 1894) | Hisonotus laevior | Loricariidae | |
| Otocinclus leptochilus | (Cope, 1894) | Hisonotus laevior | Loricariidae | |
| Otocinclus leucofrenatus | Miranda Ribeiro, 1908 | Hisonotus leucofrenatus | Loricariidae | |
| Otocinclus lophophanes | (Eigenmann & Eigenmann, 1889) | Otothyris lophophanes | Loricariidae | Brown sucker catfish |
| Otocinclus macrospilus | Eigenmann & Allen, 1942 | Otocinclus macrospilus | Loricariidae | |
| Otocinclus maculicauda | Steindachner, 1877 | Parotocinclus maculicauda | Loricariidae | |
| Otocinclus maculipinnis | Regan, 1912 | Hisonotus maculipinnis | Loricariidae | |
| Otocinclus mangaba | Lehmann A., Mayer & Reis, 2010 | Otocinclus mangaba | Loricariidae | |
| Otocinclus mariae | Fowler, 1940 | Otocinclus mariae | Loricariidae | |
| Otocinclus mimulus | Axenrot & Kullander, 2003 | Otocinclus mimulus | Loricariidae | |
| Otocinclus mura | Schaefer, 1997 | Otocinclus mura | Loricariidae | |
| Otocinclus nigricauda | Boulenger, 1891 | Hisonotus nigricauda | Loricariidae | |
| Otocinclus notatus | (Eigenmann & Eigenmann, 1889) | Hisonotus notatus | Loricariidae | |
| Otocinclus obtusus | Miranda Ribeiro, 1911 | Pseudotothyris obtusa | Loricariidae | |
| Otocinclus paulinus | Regan, 1908 | Hisonotus paulinus | Loricariidae | |
| Otocinclus spectabilis | Eigenmann, 1914 | Nannoptopoma spectabile | Loricariidae | |
| Otocinclus tapirape | Britto & Moreira, 2002 | Otocinclus tapirape | Loricariidae | |
| Otocinclus tietensis | Ihering, 1907 | Pseudotocinclus tietensis | Loricariidae | |
| Otocinclus vestitus | Cope, 1872 | Otocinclus vestitus | Loricariidae | |
| Otocinclus vittatus | Regan, 1904 | Otocinclus vittatus | Loricariidae | |
| Otocinclus xakriaba | Schaefer, 1997 | Otocinclus xakriaba | Loricariidae |