Dictionary of Human Evolution and Biology

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Altanius Orlovi Dashzeveg And McKenna, 1977

Fossil species from the late Paleocene and early Eocene of Mongolia. Based on characteristics of the lower back premolar (P4) it has been referred to as a tarsiiform provisionally assigned to the Omomyidae, although this affinity has been questioned. Other authors suggest it belongs with the anaptomorphines (Anaptomorphinae). A. orlovi is known only from a single right mandibular fragment that contained the lower fourth premolar and the three lower molars. If A. orlovi is a tarsiiform, it is the oldest Asian representative of that taxon. Very small, with an estimated body mass of 30 g. The dentition suggests an insectivorous, a nectarivorous, or a gummivorous diet.

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