
%0 Journal Article
%A Kennedy, JA 
%T The karyotes of some Australian Rodents (Rodentia : Muridae)
%J Australian Journal of Zoology
%D 1969/06/01
%V 17
%N 3
%P 465-471
%K 
%R https://doi.org/10.1071/ZO9690465
%U https://www.publish.csiro.au/paper/ZO9690465 
%X The number and morphology of the chromosomes of 11 species of Australian rodents have been described. It is suggested that Rattus lutreolus (2n = 42) is derived from an ancestor closely related to R. norvegicus (2n = 42) and that the former gave rise, in Australia, to R. fuscipes (2n = 38). R. fuscipes then gave rise to R. greyi (2n = 38) and R. assimilis (2n = 38) with both of which it is conspecific.    Pseudomys minnie (2n = 48) and two species of Leggadina (2n = 48) have very similar karyotypes which differ from the karyotypes of two species of Notomys (2n = 48). The latter have apparently identical chromosomes. Within the Pseudomys group, marked changes in the heteromorphic pair of chromosomes have been involved in the evolution of karyotypes. 
