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).