Oryzomys melanotis (Thomas, 1893)

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 : 85

melanotis

Karyotype: 2n = 62 and FN = 70. Autosomal complement: one medium subtelocentric pair, four metacentric pairs (one medium and three small), and 25 acrocentric pairs large to small decreasing in size. Sex chromosomes: X, a large metacentric; Y, a medium subtelocentric. C-banding metaphases exhibited blocks of constitutive heterochromatin on the pericentromeric region of all autosomes. The X chromosome presented a pericentromeric heterochromatic blocks ( Haiduk et al. 1979, pp. 611, Fig. 1A ). G-banding karyotype was performed by Haiduk et al. (1979) and Baker et al. (1983).

Figures

FIGURE 1. Collection localities of Oryzomyini species analyzed in this work. (1) Claúdia, Mato Grosso state; (2) and (3) Rio Japurá, Amazonas state; (4) and (5) Rio Içá, Amazonas state.