Drymoreomys Percequillo, Weksler & Costa 2011

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 : 13

Drymoreomys Percequillo, Weksler & Costa 2011

Monotypic genus represented by D. albimaculatus ( Percequillo, Weksler & Costa 2011), all known specimens were from the eastern slopes of the Serra do Mar, in the coastal Brazilian Atlantic Rainforest from Rio de Janeiro to Santa Catarina states ( Percequillo et al. 2011; Delciellos et al. 2015).

Karyotype: 2n = 62 and FN = 62. Autosomal complement: one small metacentric pair, and 29 acrocentric pairs large to small decreasing in size. Sex chromosomes: X, a large submetacentric; Y, a large submetacentric slightly smaller than the X ( Suárez-Villota et al. 2013, pp. 68, Fig. 1 ; Delciellos et al. 2015). C-banding metaphases exhibited pericentromeric constitutive heterochromatic blocks on all autosomes and on the long arm of Y. G-banding was also performed. FISH with telomeric sequences revealed signals at the ends of all chromosomes, and additional telomeric sequences were found on the pericentromeric region of both X and Y chromosomes ( Suárez-Villota et al. 2013).

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.