Neacomys minutus

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 : 33

Neacomys minutus

Karyotype: 2n = 35–36 and FN = 40. Autosomal complement: three small metacentric pairs, and 14 acrocentric pairs (three large, one medium, and the remaining small decreasing in size). The medium-sized element was apparently involved in a Robertsonian polymorphism, with heterozygous individuals found at two different localities, all others localities were homozygous for the acrocentric condition ( Table 6, Fig. 7 ). Sex chromosomes: X, a mediumsmall metacentric; Y, a small acrocentric ( Patton et al. 2000, pp. 110, Fig. 75B).

Figures

FIGURE 7. Distribution of diploid and fundamental number of karyotyped specimens of genus Neacomys. (♦) N. dubosti; (☆) N. macedoruizi; (r) N. minutus; (○) N. musseri; (■) N. paracou; (l) N. rosalindae; (ê) N. spinosus; (◊) Neacomys sp.; (□) Neacomys sp. 1; (▲) Neacomys sp. 2.