A Taxonomic Revision of the Small Catarrhine Primates from the Early Miocene of East Africa

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Abstract
This paper presents a detailed systematic revision of the small catarrhine primates from the early Miocene of East Africa, recovered from sites in Western Kenya and in Uganda dated at between 22 and 17 m.y. Revised diagnoses and amended hypodigms for each of the species are presented. In addition to the currently identified taxa, Limnopithecus legetet Hopwood, 1933, Dendropithecus macinnesi (Le Gros Clark and Leakey, 1950) and Micropithecus clarki Fleagle and Simons, 1978, two further species are recognized. Limnopithecus evansi (Maclnnes, 1943) is resurrected as a valid species, based primarily on previously described material from Songhor, and a new genus, Kalepithecus, is described here for the first time, in order to accommodate distinctive material from Songhor and Koru. The distribution of each species in time and space, and the phylogenetic relationships, are discussed in the light of this taxonomic revision.