A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster
Abstract A new species of Osteogaster is described from the Aripuanã and Juruena river basins, rio Amazonas system, differing from its congeners by having the following combination of features: (I)a conspicuous, oblique dorsolateral dark stripe on flanks, from first dorsolateral body plate to middle...
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Sociedade Brasileira de Ictiologia
2025-07-01
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252025000200211&lng=en&tlng=en |
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| author | Luiz Fernando Caserta Tencatt Vandergleison de Carvalho Hugmar Pains da Silva Marcelo Ribeiro de Britto |
| author_facet | Luiz Fernando Caserta Tencatt Vandergleison de Carvalho Hugmar Pains da Silva Marcelo Ribeiro de Britto |
| author_sort | Luiz Fernando Caserta Tencatt |
| collection | DOAJ |
| description | Abstract A new species of Osteogaster is described from the Aripuanã and Juruena river basins, rio Amazonas system, differing from its congeners by having the following combination of features: (I)a conspicuous, oblique dorsolateral dark stripe on flanks, from first dorsolateral body plate to middle portion of caudal-fin base, variably extending diffuse on ventral lobe of caudal fin, and (II) posterolateral portion of scapulocoracoid moderately developed, not expanded mesially. In the light of the new data presented in a recent publication led by the first author, Osteogaster is herein diagnosed by the following combination of features: (I) mesethmoid moderate in size, (II) posterior margin of pectoral-fin spine with all or nearly all serrations directed towards the tip of the spine or perpendicularly directed, (III) posterior laminar expansion of infraorbital 2 contacting pterotic–extrascapular, (IV) anterodorsal edge of infraorbital 2 expanded anteriorly, and (V) ground color of body yellowish orange to reddish orange, with only a single, large dark patch on flanks; all fins devoid of dark spots. The distribution and exclusiveness of key morphological features present in distinct genera of Corydoradinae are discussed. Furthermore, an identification key to the species of Osteogaster is also provided. |
| format | Article |
| id | doaj-art-449bae291e4245bda29a96b80da25cce |
| institution | Kabale University |
| issn | 1982-0224 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj-art-449bae291e4245bda29a96b80da25cce2025-08-20T03:50:44ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242025-07-0123210.1590/1982-0224-2024-0134A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of OsteogasterLuiz Fernando Caserta Tencatthttps://orcid.org/0000-0002-8437-4354Vandergleison de Carvalhohttps://orcid.org/0000-0001-8861-3511Hugmar Pains da Silvahttps://orcid.org/0000-0003-3540-2889Marcelo Ribeiro de Brittohttps://orcid.org/0000-0002-0611-6923Abstract A new species of Osteogaster is described from the Aripuanã and Juruena river basins, rio Amazonas system, differing from its congeners by having the following combination of features: (I)a conspicuous, oblique dorsolateral dark stripe on flanks, from first dorsolateral body plate to middle portion of caudal-fin base, variably extending diffuse on ventral lobe of caudal fin, and (II) posterolateral portion of scapulocoracoid moderately developed, not expanded mesially. In the light of the new data presented in a recent publication led by the first author, Osteogaster is herein diagnosed by the following combination of features: (I) mesethmoid moderate in size, (II) posterior margin of pectoral-fin spine with all or nearly all serrations directed towards the tip of the spine or perpendicularly directed, (III) posterior laminar expansion of infraorbital 2 contacting pterotic–extrascapular, (IV) anterodorsal edge of infraorbital 2 expanded anteriorly, and (V) ground color of body yellowish orange to reddish orange, with only a single, large dark patch on flanks; all fins devoid of dark spots. The distribution and exclusiveness of key morphological features present in distinct genera of Corydoradinae are discussed. Furthermore, an identification key to the species of Osteogaster is also provided.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252025000200211&lng=en&tlng=enCorydoradinaeCorydoras sp. CW68Rio AripuanãRio JuruenaTaxonomy |
| spellingShingle | Luiz Fernando Caserta Tencatt Vandergleison de Carvalho Hugmar Pains da Silva Marcelo Ribeiro de Britto A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster Neotropical Ichthyology Corydoradinae Corydoras sp. CW68 Rio Aripuanã Rio Juruena Taxonomy |
| title | A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster |
| title_full | A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster |
| title_fullStr | A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster |
| title_full_unstemmed | A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster |
| title_short | A new striped Osteogaster (Siluriformes: Callichthyidae) from the Madeira and Tapajós river basins, Brazil, with a new generic diagnosis and an identification key to the species of Osteogaster |
| title_sort | new striped osteogaster siluriformes callichthyidae from the madeira and tapajos river basins brazil with a new generic diagnosis and an identification key to the species of osteogaster |
| topic | Corydoradinae Corydoras sp. CW68 Rio Aripuanã Rio Juruena Taxonomy |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252025000200211&lng=en&tlng=en |
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