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SVPCA
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A new primate clade from the European Eocene
 
SVPCA Conference
 
Platform presentation (20 minutes)
Authors
 
*David L Harrison
 
 
Jerry J Hooker
 
Abstract
 
Adapis ulmensis was described by Schmidt-Kittler (1971) from the German Late Eocene fissure filling of Ehrenstein 1, based on two cheek teeth. Subsequently, it was transferred to the genus Protoadapis when additional isolated cheek teeth were found at nearby fissure fill sites. Adapis and Protoadapis are members of the extinct primate family Adapidae, which is characterised by a nearly complete placental dental formula, with large canines and small incisors. New dentally comprehensive material of P. ulmensis from the Late Eocene Solent Group of the Isle of Wight shows the presence of enlarged first incisors and reduction of the anterior premolars. These dental characteristics indicate that P. ulmensis is a member of the extinct primate family Omomyidae (subfamily Microchoerinae), not Adapidae. P. ulmensis closely resembles late Middle Eocene Nannopithex quaylei, a microchoerine from the English site of Creechbarrow. A slightly more distant relationship exists with early Middle Eocene Nannopithex raabi and N. humilidens from the German site of Geiseltal. These species together represent a distinct clade that warrants the status of new genus. This clade spans at least 10 million years of the Eocene in Europe and probably diverged from other microchoerine clades as early as the Early Eocene.
London 2020