Data/hora: 02/06/2024 03:52:30

Provedor de dados: | Neotropical Ichthyology
País: | Brazil
Título: | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features
Autores: | Pinna,Mario de; Abrahão,Vitor; Reis,Vinicius; Zanata,Angela.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Chapada Diamantina; Endemism; Rio Paraguaçu; Systematics; Taxonomy.
Resumo: | ABSTRACT A new species of the Copionodontinae genus Copionodon is described from the riacho do Mosquito, tributary to rio Santo Antônio, rio Paraguaçu basin in the Diamantina Plateau, Bahia State, northeastern Brazil. This species represents the northernmost occurrence of the subfamily yet known and is a relictual population, apparently restricted to an underground sector of the stream and its immediate downstream exit. The new species can be readily recognized by the combination of the presence of opercular odontodes, the mostly uniform coloration of the body, and the lack of a free orbital rim. Despite several troglomorphic traits shared between the new species and Glaphyropoma spinosum, the two species are not closest relatives and all such similarities are convergent adaptations to the subterranean habitat. A CT-Scan study of the holotype of the new species is presented and allows a view into the details of copionodontine anatomy with unprecedented clarity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400214
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/1982-0224-20180049
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.16 n.4 2018
Fonte: | info:eu-repo/semantics/openAccess