A new species of spiny Rineloricaria (Siluriformes: Loricariidae) from the Rio Paraíba do Sul basin and costal rivers from Rio de Janeiro State

da Costa Silva, Guilherme José; de Souza Da Costa E Silva, Gabriel [UNESP]; Oliveira, Claudio [UNESP]

A new species of spiny Rineloricaria (Siluriformes: Loricariidae) from the Rio Paraíba do Sul basin and costal rivers from Rio de Janeiro State

Data

2022-08-16

Autores

da Costa Silva, Guilherme José

de Souza Da Costa E Silva, Gabriel

Oliveira, Claudio

Tipo

Artigo

Resumo

Although the genus Rineloricaria is widely distributed in the Neotropical region, its species usually occupy single drainages with high habitat fidelity. Rineloricaria species show evident sexual dimorphism with hypertrophied odontodes in sexually mature males. Here, we describe a new species of Rineloricaria present in the Rio Paraiba do Sul basin and coastal rivers in Rio de Janeiro State. The new species has extreme sexual dimorphism making possible to differentiate it from all congeners. The new species can also be separated from other sympatric species by morphometric characteristics and dermal plates pattern.