"Amala River" (= upper course of Mara River), Kenya. Although M. pernanus is grouped in the genus Mastomys based on morphological grounds, molecular data from one speci men grouped it with Hylomyscus. Monotypic. Distribution. Mostly Serengeti Plains on the border between Kenya and Tanzania, with an aberrant specimen from EC Tanzania and an unconfirmed record from Rwanda. in Muridae

"Amala River" (= upper course of Mara River), Kenya. Although M. pernanus is grouped in the genus Mastomys based on morphological grounds, molecular data from one speci men grouped it with Hylomyscus. Monotypic. Distribution. Mostly Serengeti Plains on the border between Kenya and Tanzania, with an aberrant specimen from EC Tanzania and an unconfirmed record from Rwanda.