Order Rodentia - Family Muridae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1189 1531 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Micaelamys granti (Wroughton 1908) [Mus] granti Wroughton 1908 , Ann. Mag. Nat. Hist., ser. 8, 1: 257 . Type Locality: South Africa , NE Western Cape Province , Deelfontein, north of Richmond, (see Chimimba, 1998:435, for details). Vernacular Names: Grant's Micaelamys . Distribution: South Africa , known only from the fynbos, succulent karoo, and nama-Karoo biomes ( Mugo et al., 1995 ) in SC South Africa (the Great Karoo region; Chimimba et al., 1999:508 ; de Graaff, 1997 w ; Skinner and Smithers, 1990:279 ). Conservation: IUCN – Least Concern as Aethomys granti . Discussion: Meester et al. (1986:292) and Chimimba (1998:435) provided historical taxonomic allocations of granti , which ranged from Myomys , through Rattus and Mastomys , and finally to Micaelamys as either genus or subgenus of Aethomys . Reviewed and compared with M. namaquensis , its closest relative, by Skinner and Smithers (1990) and also reviewed by de Graaff (1997 w ) . Analysis of geographic variation ( Chimimba et al., 1998 ) suggested a clinal pattern (southwesterly-northeasterly) with size of cranium negatively correlated with longitude and positively with latitude. No significant steps in the clinal variation were detected and subspecies were not recognized.