Rineloricaria nigricauda
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Siluriformes
- family: Loricariidae
- genus: Rineloricaria
- species: Rineloricaria nigricauda
Tabatinga
Amazonas- Uruguaiana
Rio Grande do Sul
Brazil
Leticia
Amazonas
Colombia
Pebas
Loreto
Peru