A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes Author Moreira, Camila Do Nascimento Author Ventura, Karen Author Percequillo, Alexandre Reis 0000-0001-9490-5457 cmoreirabio@gmail.com Author Yonenaga-Yassuda, Yatiyo text Zootaxa 2020 2020-11-06 4876 1 1 111 journal article 7983 10.11646/zootaxa.4876.1.1 4ee8b608-7c73-4980-9e86-3e3719e91c7f 1175-5326 4423612 190EC586-E14B-4AEF-A5EF-3DA401656159 Oecomys concolor Karyotype: 2n = 60 and FN = 62. Autosomal complement: one large subtelocentric pair, one small metacentric pair, and 27 acrocentric pairs large to small decreasing in size. Sex chromosomes: X, a large submetacentric; Y, a medium subtelocentric ( Gardner & Patton 1976 , pp. 12, Fig. 5C ). Baker et al . (1983) also reported a diploid number of 2n = 58 and 2n = 60 for O. concolor , and performed the G-banding of these karyotypes. The karyotype of O. concolor reported by Gardner & Patton (1976) was very similar to that presented for O. catherinae . However, systematic works of the genus ( Gomes-Júnior et al . 2016 ; Suárez-Villota et al . 2017 ) recognized this karyotype as belonging to O. concolor .