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Hindlimb adaptations in Ourayia and Chipetaia, relatively large-bodied omomyine primates from the Middle Eocene of Utah by Rachel H. Dunn; Julia M. Sybalsky; Glenn C. Conroy; D. Tab Rasmussen is a Arts and Humanities article available to read on EtoBox.

What is Hindlimb adaptations in Ourayia and Chipetaia, relatively large-bodied omomyine primates from the Middle Eocene of Utah about?

## Abstract 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 __Ourayia uintensis__ and __Chipetaia lamporea__ 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 __Ourayia uintensis__ and __Chipetaia lamporea__ weighed about 1,500–2,000 g and 500–700 g, respectively. Skeletal elements recovered for __Ourayia__ include the talus, navicular, entocuneiform, first metatarsal, and proximal tibia; bones of __Chipetaia__ include the talus, navicular, entocuneiform, and proximal femur. Both genera had opposable grasping big toes, as indicated by the saddle‐shaped joint between the entocuneiform and first metatarsal. Both taxa were arboreal leapers, as indicated by a consistent assemblage

Who reads Hindlimb adaptations in Ourayia and Chipetaia, relatively large-bodied omomyine primates from the Middle Eocene of Utah?

Author

Rachel H. Dunn; Julia M. Sybalsky; Glenn C. Conroy; D. Tab Rasmussen

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley; Research Square (ISSN 0002-9483)

Published

2006

Language

EN

Field

Arts and Humanities (Social Sciences)