A detailed assessment of the maxillary morphology of Limnopithecus evansi with implications for the taxonomy of the genus.

Limnopithecus is a small-bodied catarrhine genus that is widespread throughout early Miocene sites in East Africa. Although two species of this genus have been described – Limnopithecus legetet (type species) and Limnopithecus evansi – they are poorly known anatomically and their systematic positions remain unresolved. Here, we provide detailed descriptions and comparisons for two well-preserved maxillary specimens that we attribute to L. evansi. These specimens come from the type locality of the species, Songhor in western Kenya, and add greatly to our knowledge of its dentognathic morphology. Together, they preserve the entire unilateral upper dentition, with overlapping elements demonstrating conspecificity, and provide new information about I2 morphology and aspects of the palate, nasal aperture, and maxillary sinuses.