Only 33 species among about 300 belonging to the families Pimelodidae and Rhamdiidae have been studied cytogenetically. The diploid number varies from 2n = 46 to 2n = 63 chromosomes, with the karyotypes often being of the meta/submetacentric type. As a result, there is generally a very elevated fundamental number.
CITATION STYLE
Swarça, A. C., Caetano, L. G., & Dias, A. L. (2000). Cytogenetics of species of the families Pimelodidae and Rhamdiidae (Siluriformes). Genetics and Molecular Biology, 23(3), 589–593. https://doi.org/10.1590/S1415-47572000000300015
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