50588 Rineloricaria longicauda Reis, 1983 Loricariidae Armored catfishes Loricariinae Siluriformes Teleostei Elongated whiptail catfish South America: Coastal drainages of Rio Grande do Sul between Chuí and Tramandaí in Brazil (Ref. 36389). Reported from Uruguay (P. Petersen, pers.comm. 02/2021).