The Wilfredomys pictipes (Rodentia : Sigmodontinae) karyotype with comments on the karyosystematics of Brazilian Thomasomyini

Authors
Bonvicino, CR Otazu, I
Citation
Cr. Bonvicino et I. Otazu, The Wilfredomys pictipes (Rodentia : Sigmodontinae) karyotype with comments on the karyosystematics of Brazilian Thomasomyini, ACT THERIOL, 44(3), 1999, pp. 329-332
Citations number
16
Categorie Soggetti
Animal Sciences
Journal title
ACTA THERIOLOGICA
ISSN journal
00017051 → ACNP
Volume
44
Issue
3
Year of publication
1999
Pages
329 - 332
Database
ISI
SICI code
0001-7051(199909)44:3<329:TWP(:S>2.0.ZU;2-0
Abstract
Karyotypic analysis of two specimens of Wilfredomys pictipes (Osgood, 1933) , collected in the Atlantic forest of Sao Paulo State, Brazil, showed 2n = 36 / FN = 34. Comparative karyologic analysis indicated that W. pictipes wa s very different from species belonging to the tribe Oryzomyini and to the genus Delomys but similar to Rhipidomys species. These findings indicated t hat the tribe Thomasomyini is not a karyotypically homogeneous taxon. The l ow diploid number of W. pictipes is likely to be a derived trait among sigm odontine rodents.