Two colobine species occur at the early Pliocene (MN 14) locality of Dorkovo: Dolichopithecus ruscinensis Depéret, 1889 and Mesopithecus monspessulanus (Gervais, 1849). Such an association is known from at least three other Ruscinian or earliest Villafranchian sites, and at two other localities a cercopithecine taxon joins the two colobines. The large colobine from the Kuchurgan localities of Ukraine has previously been considered either a distinct genus or a separate species of Dolichopithecus, but it is here synomymized with D. ruscinensis; an isolated Kuchurgan molar previously published as a macaque is here tentatively re-identified as a colobine, perhaps M. monspessulanus. No temporal patterning has been observed either for associations among these Pliocene genera or of size change within the two Dorkovo taxa.
Mammalia, Primates, Colobinae, Dolichopithecus ruscinensis, Mesopithecus monspessulanus, Pliocene, Ruscinian, Bulgaria