Neacomys macedoruizi

Karyotype: 2n = 28 and FN = 36. Autosomal complement: five metacentric pairs (one large, one medium, and three small), and eight acrocentric pairs (one large, and seven small). Sex chromosomes: X, a medium submetacentric; Y, a small acrocentric (Sánchez-Vendizú et al. 2018, pp. 16, Fig. 7C).