On allozyme and craniometric differentiation of some rat genera andspecies (Rodentia, Murinae) from Southern Vietnam [Russian]

摘要

The genera Niviventer (3 species), Maxomys (2 species), Berylmys (1 species), Leopoldamys (1 species) and Rattus (2 species) were compared according to 18 protein loci. The differences between the species N. langbianis, N. tenaster, N. fulvescens were considered in terms of 27 protein loci. The level of differences (D-nei) is 0.710-1.811 for genera; 0.513, for Maxomys species; 0.200, for Rattus species; 0.275-0.633, for Niviventer species. The species N. langbianis is the most isolated. The genus Maxomys is closely related to Rattus based on the allozyme data. Skulls of N. tenaster adults differ from those of N. fulvescens in their shorter incisive foramines (they do not exceed 67% of the diastem length) and in their larger tympanic bulae (not less than 5.2 mm of long).