In a sample of limestone from Black Crow, Namibia, acid-treated in May, 2018, there was a complete germ of a lower third molar of the rodent Tsaukhaebmys calcareus. The crown is fully formed, but there are no roots, and the only sign of wear is a slight abrasion at the apex of the metaconid, possibly due to post-mortem processes rather than to occlusal wear. All the fine details of the crown morphology are clearly visible. Previous samples of lower molars of this species were either deeply worn or broken or were in crypto and thus not completely visible. This tooth underlines the distinctive taxonomic status of the genus within Zegdoumyidae. Keywords: Ypresian/Lutetian, m/3, dental morphology, Southern Africa, Zegdoumyidae, Rodentia.