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- Title
Chromosomal similarity between two species of Apteronotus albifrons complex (Apteronotidae–Gymnotiformes) implications in cytotaxonomy and karyotypic evolution.
- Authors
Takagui, Fábio Hiroshi; da Rosa, Renata; Shibatta, Oscar Akio; Giuliano-Caetano, Lucia
- Abstract
Apteronotidae is one of the oldest families from the order Gymnotiformes, and is composed of 94 species that can be found from Panama to northern Argentina. Some groups such asApteronotuspresent taxonomic problems, mainly related to interspecific morphological similarity. In the present study, two species belonging toApteronotus albifronscomplex from different hydrographic basins were cytogenetically analyzed in order to define chromosomal structure and propose evolutionary trends for the group.Apteronotus albifronspresented 2n= 24 (14 m + 2sm + 8a) FN = 40 andApteronotus caudimaculosus2n= 24 (12 m + 2sm + 10a) FN = 38; this difference in karyotypic formulae can be explained by pericentric inversion involving metacentric and acrocentric chromosomes. The karyotypic similarity between these two species indicates a chromosomal diversification, characterized by changes in karyotype formulae, which were considered an excellent cytotaxonomic marker to discriminateA. caudimaculosusof other populations ofApteronotus albifronscomplex.
- Publication
Caryologia, 2017, Vol 70, Issue 2, p147
- ISSN
0008-7114
- Publication type
Article
- DOI
10.1080/00087114.2017.1306385