A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications
A new species of Corydoras is described from tributaries of the rio Arinos, rio Teles Pires and rio Preto, all in the rio Tapajós basin. The new species is a member of a group that includes 36 species with spots on the body. Within this group, the new species can be readily distinguished by having a...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2014-01-01
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| Series: | Papéis Avulsos de Zoologia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492014000300001&lng=en&tlng=en |
| _version_ | 1818288881781440512 |
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| author | Vinicius C. Espíndola Marcelo R.S. Spencer Leandro R. Rocha Marcelo R. Britto |
| author_facet | Vinicius C. Espíndola Marcelo R.S. Spencer Leandro R. Rocha Marcelo R. Britto |
| author_sort | Vinicius C. Espíndola |
| collection | DOAJ |
| description | A new species of Corydoras is described from tributaries of the rio Arinos, rio Teles Pires and rio Preto, all in the rio Tapajós basin. The new species is a member of a group that includes 36 species with spots on the body. Within this group, the new species can be readily distinguished by having a smaller dorsal-fin spine than the first three subsequent soft dorsal-fin rays; pectoral, pelvic and anal fins hyaline; dorsal-fin interradial membrane hyaline; rounded spots on trunk restricted to dorsolateral body plates and dorsal portion of ventrolateral body plates, not reaching the base of pelvic and anal fins. The new species can be further distinguished from Corydoras xinguensis by having spots with diffuse edges, and from all other species of spotted Corydoras except C.multimaculatus, by the absence of ventral platelets. A phylogenetic analysis recovered the new species plus Corydoras metae and C.araguaiensis in a clade sharing the presence of a pointed process on the maxilla for insertion of the retractor tentaculi muscle. In addition, the presence in the new species of an elongated anterior portion of the mesethmoid and a triangular uncinate process of the epibranchial 3 suggests a close relationship with Corydoras metae. |
| first_indexed | 2024-12-13T02:03:26Z |
| format | Article |
| id | doaj.art-2bef5eeaed834fca99ece724b106bfd3 |
| institution | Directory Open Access Journal |
| issn | 1807-0205 |
| language | English |
| last_indexed | 2024-12-13T02:03:26Z |
| publishDate | 2014-01-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Papéis Avulsos de Zoologia |
| spelling | doaj.art-2bef5eeaed834fca99ece724b106bfd32022-12-22T00:03:12ZengUniversidade de São PauloPapéis Avulsos de Zoologia1807-02052014-01-01543253210.1590/0031-1049.2014.54.03S0031-10492014000300001A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implicationsVinicius C. Espíndola0Marcelo R.S. Spencer1Leandro R. Rocha2Marcelo R. Britto3Universidade Federal do Rio de JaneiroUniversidade Federal do Rio de JaneiroUniversidade Federal do Rio de JaneiroUniversidade Federal do Rio de JaneiroA new species of Corydoras is described from tributaries of the rio Arinos, rio Teles Pires and rio Preto, all in the rio Tapajós basin. The new species is a member of a group that includes 36 species with spots on the body. Within this group, the new species can be readily distinguished by having a smaller dorsal-fin spine than the first three subsequent soft dorsal-fin rays; pectoral, pelvic and anal fins hyaline; dorsal-fin interradial membrane hyaline; rounded spots on trunk restricted to dorsolateral body plates and dorsal portion of ventrolateral body plates, not reaching the base of pelvic and anal fins. The new species can be further distinguished from Corydoras xinguensis by having spots with diffuse edges, and from all other species of spotted Corydoras except C.multimaculatus, by the absence of ventral platelets. A phylogenetic analysis recovered the new species plus Corydoras metae and C.araguaiensis in a clade sharing the presence of a pointed process on the maxilla for insertion of the retractor tentaculi muscle. In addition, the presence in the new species of an elongated anterior portion of the mesethmoid and a triangular uncinate process of the epibranchial 3 suggests a close relationship with Corydoras metae.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492014000300001&lng=en&tlng=enCorydoradinaeNeotropicalFilogeniaTaxonomiaBiodiversidade |
| spellingShingle | Vinicius C. Espíndola Marcelo R.S. Spencer Leandro R. Rocha Marcelo R. Britto A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications Papéis Avulsos de Zoologia Corydoradinae Neotropical Filogenia Taxonomia Biodiversidade |
| title | A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications |
| title_full | A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications |
| title_fullStr | A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications |
| title_full_unstemmed | A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications |
| title_short | A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications |
| title_sort | new species of corydoras lacepede siluriformes callichthyidae from the rio tapajos basin and its phylogenetic implications |
| topic | Corydoradinae Neotropical Filogenia Taxonomia Biodiversidade |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492014000300001&lng=en&tlng=en |
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