抄録
Nakali is an early Late Miocene fossil locality in north-central Kenya, where the Kenya–Japan Joint Expedition team has carried out fieldwork since 2002. Previously, a large hominoid Nakalipithecus nakayamai was reported from site NA39 of this locality. In addition to Nakalipithecus, the hominoid material collected from Nakali includes an isolated P3, which shows a considerably different morphology from the P3 assigned to Nakalipithecus, suggesting the presence of a different hominoid species. The general morphology of this P3 is reminiscent of that of primitive hominoids such as Proconsul, which are mainly known from the Early Miocene of East Africa. Although the present material is limited, the presence of a primitive-looking second hominoid species in Nakali indicates a higher hominoid (and hominoid-like catarrhine) diversity in the early Late Miocene of Africa than previously envisaged.
