Data/hora: 02/06/2024 03:57:22

Provedor de dados: | Neotropical Ichthyology
País: | Brazil
Título: | Cytotaxonomic diagnosis of Trichomycterus diabolus (Teleostei: Trichomycteridae) with comments about its evolutionary relationships with co-generic species
Autores: | Torres,Rodrigo A.; Oliveira,Claudio; Foresti,Fausto.
Data: | 2004-09-01
Ano: | 2004
Palavras-chave: | Trichomycterinae; Karyotype; Chromosome evolution; Fish cytogenetic.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000300003
Editor: | Sociedade Brasileira de Ictiologia
Relação: | 10.1590/S1679-62252004000300003
Formato: | text/html
Fonte: | Neotropical Ichthyology  v.2 n.3 2004
Fonte: | info:eu-repo/semantics/openAccess