{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,17]],"date-time":"2026-03-17T21:07:55Z","timestamp":1773781675210,"version":"3.50.1"},"reference-count":53,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2006,4,14]],"date-time":"2006-04-14T00:00:00Z","timestamp":1144972800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J Phys Anthropol"],"published-print":{"date-parts":[[2006,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>North American omomyids represent a tremendous Eocene radiation of primates exhibiting a wide range of body sizes and dietary patterns. Despite this adaptive diversity, relatively little is known of the postcranial specializations of the group. Here we describe hindlimb and foot bones of <jats:italic>Ourayia uintensis<\/jats:italic> and <jats:italic>Chipetaia lamporea<\/jats:italic> that were recovered from the Uinta B member (early Uintan Land Mammal Age), Uinta Formation, Utah. These specimens provide insights into the evolution of postcranial adaptations across different body sizes and dietary guilds within the Eocene primate radiation. Body mass estimates based on talar measurements indicate that <jats:italic>Ourayia uintensis<\/jats:italic> and <jats:italic>Chipetaia lamporea<\/jats:italic> weighed about 1,500\u20132,000 g and 500\u2013700 g, respectively. Skeletal elements recovered for <jats:italic>Ourayia<\/jats:italic> include the talus, navicular, entocuneiform, first metatarsal, and proximal tibia; bones of <jats:italic>Chipetaia<\/jats:italic> include the talus, navicular, entocuneiform, and proximal femur. Both genera had opposable grasping big toes, as indicated by the saddle\u2010shaped joint between the entocuneiform and first metatarsal. Both taxa were arboreal leapers, as indicated by a consistent assemblage of characters in all represented bones, most notably the somewhat elongated naviculars, the high and distinct trochlear crests of the talus, the posteriorly oriented tibial plateau (<jats:italic>Ourayia<\/jats:italic>), and the cylindrical head of the femur (<jats:italic>Chipetaia<\/jats:italic>). The closest resemblances to <jats:italic>Ourayia<\/jats:italic> and <jats:italic>Chipetaia<\/jats:italic> are found among the Bridger omomyines, <jats:italic>Omomys<\/jats:italic> and <jats:italic>Hemiacodon<\/jats:italic>. The results of our comparisons suggest that the later, larger, more herbivorous omomyines from Utah retained a skeletal structure characteristic of earlier, smaller North American omomyids. Am J Phys Anthropol, 2006. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ajpa.20407","type":"journal-article","created":{"date-parts":[[2006,4,14]],"date-time":"2006-04-14T15:54:37Z","timestamp":1145030077000},"page":"303-310","source":"Crossref","is-referenced-by-count":30,"title":["Hindlimb adaptations in <i>Ourayia<\/i> and <i>Chipetaia<\/i>, relatively large\u2010bodied omomyine primates from the Middle Eocene of Utah"],"prefix":"10.1002","volume":"131","author":[{"given":"Rachel H.","family":"Dunn","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julia M.","family":"Sybalsky","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Glenn C.","family":"Conroy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. 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