A new karyotype for the spiny rat Clyomys laticeps (Thomas, 1909) (Rodentia, Echimyidae) from Central Brazil

作者：Bezerra Alexandra M R^*; Pagnozzi Juliana M; Carmignotto Ana Paula; Yonenaga Yassuda Yatiyo; Rodrigues Flavio H G

来源：Comparative Cytogenetics, 2012, 6(2): 153-161.

DOI：10.3897/CompCytogen.v6i2.1980

• Clyomys
• Cerrado
• cytogenetic
• Echimyidae
• taxonomy
• semifossorial habit

Clyomys Thomas, 1916 is a semifossorial rodent genus of spiny rats represented by only one species, C. laticeps, which inhabits the tropical savannas and grasslands of central Brazil and eastern Paraguay. Here we describe a new karyotype of C. laticeps found in populations of Emas National Park, Goias state, Brazil. The four analyzed specimens had a diploid number (2n) of 32 and a fundamental autosome number (FN) of 54. Cytogenetic data include conventional staining, CBG and GTG-banding. The karyotype presents 12 meta/submetacentric pairs (1 to 12) and 3 pairs of acrocentrics (13 to 15) with gradual decrease in size. The X chromosome is a medium submetacentric and the Y is a medium acrocentric. The semifossorial habits together with habitat specificity could have contributed to the karyological variations found on this genus.

• 出版日期2012