Omomys

Omomys; Temporal range: Middle Eocene–Late Eocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Primates
Suborder:	Haplorhini
Family:	† Omomyidae
Genus:	† Omomys ; Leidy, 1869
Species
	Omomys carteri (Leidy, 1869); Omomys lloydi (Gazin, 1958);
Synonyms
	Euryacodon lepidus (Marsh, 1872)

Last updated September 15, 2025

Omomys is an extinct genus of omomyid primate from Middle Eocene North America.^[1]

Description

The postcrania of Omomys suggest it was adapted for leaping, bearing long ischia and ilia.^[2] The mastoid part of the temporal bone was pneumatized.^[3] Compared to European microchoerines, Omomys was more basal in postcrania, lacking a prominent posterior talar shelf.^[4]^[2]Omomys is thought to have weighed around 300 grams.^[4]

References

↑ Scott, William B.; Osborn, Henry Fairfield (1890). "The Mammalia of the Uinta Formation". Transactions of the American Philosophical Society. 16 (3): 461–572. doi:10.2307/1005400. ISSN 0065-9746.
1 2 Anemone, R. L.; Covert, H. H. (2000-05-01). "New skeletal remains of Omomys(Primates, Omomyidae): functional morphology of the hindlimb and locomotor behavior of a Middle Eocene primate". Journal of Human Evolution. 38 (5): 607–633. doi:10.1006/jhev.1999.0371. ISSN 0047-2484.
↑ Ross, Callum F.; Covert, Herbert H. (2000-08-01). "The petrosal of Omomys carteriand the evolution of the primate basicranium". Journal of Human Evolution. 39 (2): 225–252. doi:10.1006/jhev.2000.0417. ISSN 0047-2484.
1 2 Dunn, Rachel H.; Sybalsky, Julia M.; Conroy, Glenn C.; Rasmussen, D. Tab (November 2006). "Hindlimb adaptations in Ourayia and Chipetaia, relatively large-bodied omomyine primates from the Middle Eocene of Utah". American Journal of Physical Anthropology. 131 (3): 303–310. doi:10.1002/ajpa.20407. ISSN 0002-9483. PMID 16617428.

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[1] Scott, William B.; Osborn, Henry Fairfield (1890). "The Mammalia of the Uinta Formation". Transactions of the American Philosophical Society. 16 (3): 461–572. doi:10.2307/1005400. ISSN 0065-9746.

[:0-2] 1 2 Anemone, R. L.; Covert, H. H. (2000-05-01). "New skeletal remains of Omomys(Primates, Omomyidae): functional morphology of the hindlimb and locomotor behavior of a Middle Eocene primate". Journal of Human Evolution. 38 (5): 607–633. doi:10.1006/jhev.1999.0371. ISSN 0047-2484.

[3] Ross, Callum F.; Covert, Herbert H. (2000-08-01). "The petrosal of Omomys carteriand the evolution of the primate basicranium". Journal of Human Evolution. 39 (2): 225–252. doi:10.1006/jhev.2000.0417. ISSN 0047-2484.

[:1-4] 1 2 Dunn, Rachel H.; Sybalsky, Julia M.; Conroy, Glenn C.; Rasmussen, D. Tab (November 2006). "Hindlimb adaptations in Ourayia and Chipetaia, relatively large-bodied omomyine primates from the Middle Eocene of Utah". American Journal of Physical Anthropology. 131 (3): 303–310. doi:10.1002/ajpa.20407. ISSN 0002-9483. PMID 16617428.

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