A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
2018-12-01
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400214&lng=en&tlng=en |
| _version_ | 1811201719875403776 |
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| author | Mario de Pinna Vitor Abrahão Vinicius Reis Angela Zanata |
| author_facet | Mario de Pinna Vitor Abrahão Vinicius Reis Angela Zanata |
| author_sort | Mario de Pinna |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T02:26:30Z |
| format | Article |
| id | doaj.art-66c4eada35f94820a191f021f20a41cc |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-12T02:26:30Z |
| publishDate | 2018-12-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-66c4eada35f94820a191f021f20a41cc2022-12-22T03:51:59ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242018-12-0116410.1590/1982-0224-20180049S1679-62252018000400214A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial featuresMario de PinnaVitor AbrahãoVinicius ReisAngela ZanataABSTRACT 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400214&lng=en&tlng=enChapada DiamantinaEndemismRio ParaguaçuSystematicsTaxonomy |
| spellingShingle | Mario de Pinna Vitor Abrahão Vinicius Reis Angela Zanata A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features Neotropical Ichthyology Chapada Diamantina Endemism Rio Paraguaçu Systematics Taxonomy |
| title | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features |
| title_full | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features |
| title_fullStr | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features |
| title_full_unstemmed | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features |
| title_short | A new species of Copionodon representing a relictual occurrence of the Copionodontinae (Siluriformes: Trichomycteridae), with a CT-scan imaging survey of key subfamilial features |
| title_sort | new species of copionodon representing a relictual occurrence of the copionodontinae siluriformes trichomycteridae with a ct scan imaging survey of key subfamilial features |
| topic | Chapada Diamantina Endemism Rio Paraguaçu Systematics Taxonomy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400214&lng=en&tlng=en |
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