The 2019 campaign of acid treatment of Eocene freshwater limestone from Black Crow, Namibia, resulted in the recovery of a minuscule mandible of an insectivoran-grade mammal representing a new genus and species of Tenrecomorpha. The specimen is the smallest mammal described from the fossil record from Africa. From the incisor alveoli to the rear end of the angle, the jaw measures a mere 8.6 mm. The jaw is relatively complete, but has lost the incisors, canine and p/2. It shows several characters that link it to the suborder Tenrecomorpha. In some morphological features it recalls Tenrecidae, in others Potamogalidae. The new genus and species throws doubt on the homogeneity of the order Afroinsectiphilia, which in its turn renders doubtful the concept of Afrotheria as currently understood. Keywords: Tenrec, Ypresian/Lutetian, Mandible, Namibia.