A review on the cytogenetics of the tribe Oryzomyini (Rodentia: Cricetidae: Sigmodontinae), with the description of new karyotypes
Moreira, Camila Do Nascimento
Ventura, Karen
Percequillo, Alexandre Reis
Yonenaga-Yassuda, Yatiyo
Zootaxa
2020
2020-11-06
4876
1
1
111
3D5RD
Thomas
1884
[151,394,907,933]
Mammalia
Cricetidae
Euryoryzomys
GBIF
Animalia
Rodentia
15
16
Chordata
species
nitidus
Karyotype: 2n = 80 and FN = 86. Autosomal complement: four small metacentric pairs, and 35 acrocentric pairs (one distinctly large and the remaining large to small decreasing in size). Sex chromosomes: X, a very large subtelocentric; Y, a small acrocentric ( Gardner & Patton 1976, pp. 4, Fig. 1E; Patton et al. 2000). A different morphology of sex chromosomes was reported by Volobouev & Aniskin (2000), a submetacentric X and a metacentric Y chromosome. C-banding metaphases exhibited blocks of constitutive heterochromatin on the pericentromeric region of all autosomes. The short arm of X and the Y were entirely heterochromatic. G-banding was also performed ( Volobouev & Aniskin 2000). FISH with telomeric sequences revealed signals exclusively at the ends of all chromosome arms and no interstitial signals were observed ( Silva et al. 2000).