The freshwater limestone deposits at Black Crow, Tsau//Khaeb National Park (Sperrgebiet) Namibia, have yielded a diverse fauna of invertebrates and vertebrates. Rodents are relatively rare and of low diversity, but include two taxa of Zegdoumyidae and a brachyodont form close to Reithroparamyinae, in particular the genus Reithroparamys. If the identification is valid, then this would be the first record of the subfamily Reithroparamyinae (family Paramyidae) in Africa, and would indicate that Black Crow could be older (Ypresian-Early Lutetian) than previously thought (Middle Lutetian). The brachyodont rodent molar is the subject of this paper and an isolated P3/ and a calcaneum from the same lot of limestone is included to complete the description. Keywords: Rodentia, Ypresian/Lutetian, Namibia, Reithroparamyinae, Palaeobiogeography.