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 Zygodontomys sp. 2 Karyotype: 2n = 82 and FN = 94. Autosomal complement: seven biarmed pairs (two large and five medium to small pairs), and 33 medium to small acrocentric pairs decreasing in size. Sex chromosomes: X, a large submetacentric; Y, a small submetacentric ( Bonvicino et al . 2003 , pp. 124, Fig. 2A ; Bonvicino et al . 2009 ). Unnamed generic taxon, currently named Handleyomys These species its provisional position as a member alfaroi group because no new genus to encompass these taxa has yet been described, alfaroi (Allen 1891) , chapmani (Thomas 1898), melanotis (Thomas 1893) , rhabdops (Merriam 1901), rostratus (Merriam 1901), and saturatior (Merriam 1901) (Weksler 2015a).