n = 5
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Polycentrus jundia | Coutinho & Wosiacki, 2014 | Polycentrus jundia | Polycentridae | |
| Polycentrus piraya | Cuvier, 1819 | Pygocentrus piraya | Serrasalmidae | San Francisco piranha |
| Polycentrus schomburgki | Müller & Troschel, 1849 | Polycentrus schomburgkii | Polycentridae | Guyana leaffish |
| Polycentrus schomburgkii | Müller & Troschel, 1849 | Polycentrus schomburgkii | Polycentridae | Guyana leaffish |
| Polycentrus tricolor | Gill, 1858 | Polycentrus schomburgkii | Polycentridae | Guyana leaffish |