Neacomys, Thomas, 1900
publication ID |
https://doi.org/ 10.11646/zootaxa.4876.1.1 |
publication LSID |
lsid:zoobank.org:pub:190EC586-E14B-4AEF-A5EF-3DA401656159 |
DOI |
https://doi.org/10.5281/zenodo.4424134 |
persistent identifier |
https://treatment.plazi.org/id/03A587ED-321C-FFF6-83E9-FDAC2961FBD6 |
treatment provided by |
Plazi |
scientific name |
Neacomys |
status |
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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).
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