Sigmodontomys Allen 1897

Moreira, Camila Do Nascimento, Ventura, Karen, Percequillo, Alexandre Reis & Yonenaga-Yassuda, Yatiyo, 2020, A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes, Zootaxa 4876 (1), pp. 1-111 : 78

Sigmodontomys Allen 1897

Monotypic genus represented by S. alfari (Allen 1897) , found throughout trans-Andean lowland and lower montane forests in Colombia, Venezuela, and Ecuador, besides Central American lowland forests from Panamá to Honduras ( Pine et al. 2012; Prado & Percequillo 2013; Weksler 2015b).

Karyotype: 2n = 56 and FN = 54. Autosomal complement: 27 acrocentric pairs large to small decreasing in size. Sex chromosomes: X, a large-medium acrocentric; Y, a small acrocentric ( Gardner & Patton 1976, pp. 13, Fig. 6A ).

Figures

FIGURE 6. Distribution of diploid and fundamental number of karyotyped specimens of genus Hylaeamys. (□) H. megacephalus; (■) H. oniscus; (○) H. perenensis; (l) H. seuanezi; (ê) H. yunganus.