Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species
The karyotype and the Ag-NOR location of a sample of Trichomycterus diabolus collected in the córrego Hortelã (Botucatu, São Paulo, Brazil) are described. The species exhibited 2n=56 chromosomes (42 metacentrics, 12 submetacentrics and 2 subtelocentrics) and the nucleolus organizing region located n...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300003&lng=en&tlng=en |
| _version_ | 1818577779655966720 |
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| author | Rodrigo A. Torres Claudio Oliveira Fausto Foresti |
| author_facet | Rodrigo A. Torres Claudio Oliveira Fausto Foresti |
| author_sort | Rodrigo A. Torres |
| collection | DOAJ |
| description | The karyotype and the Ag-NOR location of a sample of Trichomycterus diabolus collected in the córrego Hortelã (Botucatu, São Paulo, Brazil) are described. The species exhibited 2n=56 chromosomes (42 metacentrics, 12 submetacentrics and 2 subtelocentrics) and the nucleolus organizing region located near to the centromere on the long arm of the largest metacentric pair. The presence of 2n=56 chromosomes in T. diabolus is an interesting characteristic since until now all cis-Andean species karyotyped presented 2n=54 chromosomes while almost all trans-Andean species presented different diploid numbers. The possible origin of this unexpected karyotypic form is discussed. |
| first_indexed | 2024-12-16T06:35:20Z |
| format | Article |
| id | doaj.art-3c2972bff9b1401595cfbf220478384c |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-16T06:35:20Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-3c2972bff9b1401595cfbf220478384c2022-12-21T22:40:48ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02242312312510.1590/S1679-62252004000300003S1679-62252004000300003Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic speciesRodrigo A. Torres0Claudio Oliveira1Fausto Foresti2Universidade Federal do ParanáUniversidade Estadual PaulistaUniversidade Estadual PaulistaThe karyotype and the Ag-NOR location of a sample of Trichomycterus diabolus collected in the córrego Hortelã (Botucatu, São Paulo, Brazil) are described. The species exhibited 2n=56 chromosomes (42 metacentrics, 12 submetacentrics and 2 subtelocentrics) and the nucleolus organizing region located near to the centromere on the long arm of the largest metacentric pair. The presence of 2n=56 chromosomes in T. diabolus is an interesting characteristic since until now all cis-Andean species karyotyped presented 2n=54 chromosomes while almost all trans-Andean species presented different diploid numbers. The possible origin of this unexpected karyotypic form is discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300003&lng=en&tlng=enTrichomycterinaekaryotypechromosome evolutionfish cytogenetic |
| spellingShingle | Rodrigo A. Torres Claudio Oliveira Fausto Foresti Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species Neotropical Ichthyology Trichomycterinae karyotype chromosome evolution fish cytogenetic |
| title | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species |
| title_full | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species |
| title_fullStr | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species |
| title_full_unstemmed | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species |
| title_short | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species |
| title_sort | cytotaxonomic diagnosis of trichomycterus diabolus teleostei trichomycteridae with comments about its evolutionary relationships with co generic species |
| topic | Trichomycterinae karyotype chromosome evolution fish cytogenetic |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300003&lng=en&tlng=en |
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