Oligoryzomys chacoensis (Myers & Carleton, 1981)

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 : 60

Oligoryzomys chacoensis

Karyotype: 2n = 58 and FN = 74. Autosomal complement: nine metacentric and submetacentric pairs (one large and remaining medium to small), and 19 acrocentric pairs (one large and the remaining medium to small). Sex chromosomes: X, a large submetacentric; Y, a medium acrocentric (Myer & Carleton 1981, pp. 16, Fig. 5B ).

The karyotypes of O. brendae and O. chacoensis were morphological different, despite the fact that they share the same diploid and fundamental number.

Figures

FIGURE 5. Distribution of diploid and fundamental number of karyotyped specimens of genus Holochilus. (■) H. brasiliensis; (□) H. chacarius; (l) H. sciureus; (○) H. venezuelae; (▲) H. vulpinus.