Dictionary of Human Evolution and Biology

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Chumashius Balchi Stock, 1933

Genus of tarsiiform primate from the late Eocene of North America belonging to the subfamily Omomyinae; monotypic; one of the more primitive omomyines. It has been suggested that Chumashius is the ancestor of Omomys, although it is more likely that they both share a common ancestor to which Chumashius is closer. Estimated body mass around 300 g. Dental formula: 2.1.3.3/2.1.3.3; known dental morphology very similar to that of the living callitrichids, suggesting insectivory and, perhaps seasonal, gummivory for Chumashius.

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