Neacomys, Thomas, 1900

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: 36

publication ID

https://doi.org/10.11646/zootaxa.4876.1.1

publication LSID

lsid:zoobank.org:pub:190EC586-E14B-4AEF-A5EF-3DA401656159

DOI

http://doi.org/10.5281/zenodo.4424134

persistent identifier

http://treatment.plazi.org/id/03A587ED-321C-FFF6-83E9-FDAC2961FBD6

treatment provided by

Plazi

scientific name

Neacomys
status

 

Neacomys   sp. B

Karyotype: 2n = 54 and FN = 66. Autosomal complement: seven metacentric and submetacentric pairs (five large and two small), and 19 acrocentric pairs medium to small decreasing in size. Sex chromosomes: X, a medium acrocentric; Y, a small subtelocentric. C-banding metaphases exhibited blocks of constitutive heterochromatin on the pericentromeric region of all autosomes. The X chromosome presented a pericentromeric heterochromatic block. The Y chromosome was almost entirely heterochromatic. G-banding was also performed. FISH with telomeric sequences revealed signals exclusively at the ends of all chromosome arms and no interstitial signals were observed ( Silva et al. 2017, pp. 7, Fig. 3 View FIGURE 3 ).

The authors established maps of chromosomal homology between the karyotype of Neacomys   sp. A and Neacomys   sp. B by using whole chromosome probes of H. megacephalus   . The comparative genomic mapping between the two Neacomys   species shows that these karyotypes differs by the occurrence of 11 fusion/fission events, one translocation, four pericentric inversions, and four heterochromatic amplification events ( Silva et al. 2017).

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Rodentia

Family

Muridae