We describe unpublished material of the poorly known hyracoid, Brachyhyrax aequatorialis from the Early Miocene of Songhor and Koru, Kenya, on the basis of specimens stored in the Community Museums of Kenya, the National Museums of Kenya and the Natural History Museum, London. As a result, we added 17 specimens to the hypodigm of this species which was previously known from only seven specimens. In addition, we describe further material of another hyracoid, Afrohyrax championi, from the Early Miocene of Mfwangano and the Middle Miocene of Kipsaraman. The chronological distributions of the two hyracoids do not overlap. Brachyhyrax appears to have lived in forest environments, a suggestion supported by its brachyodont dentition and the associated molluscan fauna, whereas Afrohyrax seems to have lived in more open wooded habitats which agree with its slightly more hypsodont dentition and the cursorial postcranial skeleton as well as with the land snails that occur with it.

L'hyracoïde Brachyhyrax aequatorialis du Miocène inférieur de Songhor et Koru au Kenya est mal connu et seulement par sept pièces. Nous en décrivons ici 17 nouveaux spécimens conservés aux Community Museums of Kenya, aux National Museums of Kenya et au Natural History Museum de Londres, ainsi que les restes d'un autre Hyracoidea, Afrohyrax championi qui provient du Miocène inférieur de Mfwangano et du Miocène moyen de Kipsaraman. Les distributions temporelles de ces hyracoïdes ne se recouvrent pas. En ce qui concerne leur écologie, Brachyhyrax semble avoir vécu dans des milieux forestiers, comme le suggèrent sa dentition brachyodonte et les faunes de mollusques associées, tandis que Afrohyrax a habité des milieux plus ouverts, comme l'indiquent sa dentition légèrement plus hypsodonte, les adaptations à la course de son squelette postcrânien et les escargots terrestres qui lui sont associés.