A new karyotype of Calomys (Rodentia, Sigmodontinae)

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Data

2001-11-27

Título da Revista

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Editor

Fundação Zoobotânica do Rio Grande do Sul

Resumo

The genus Calomys Waterhouse, 1837 is widely distributed within South America, being found in Venezuela, Colombia, Peru, Bolivia, Brazil, Paraguay, Uruguay and Argentina. Specimens of Calomys were collected in Formoso do Araguaia, Tocantins, Brazil. For chromosome characterization standard staining techniques and as G-banding and nucleolar organizer region were used. The karyotype was 2n=46 and AN=66. The X chromosome is a medium metacentric and the Y chromosome a small acrocentric chromosome. Chromosome homologies with other species were observed. Probably, karyotype differences were basically due to Robertsonian rearrangements.

Descrição

Palavras-chave

Calomys, karyotype, chromosome, Tocantins, Brazil

Como citar

Iheringia. Série Zoologia. Fundação Zoobotânica do Rio Grande do Sul, n. 91, p. 133-136, 2001.