Show simple item record

dc.contributor.authorJenkins, Farish
dc.date.accessioned2019-01-04T16:57:30Z
dc.date.issued1993-01-01
dc.identifier.citationJenkins, Farish A. Jr. 1993. “The Evolution of the Avian Shoulder Joint.” American Journal of Science 293 (A): 253–67. https://doi.org/10.2475/ajs.293.a.253.en_US
dc.identifier.issn0002-9599en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:37971070*
dc.description.abstractThe concavoconvex glenoid and bulbous humeral head of modern birds represent both structurally and functionally a hemisellar (half saddle) joint modified from a pattern common among post-Paleozoic tetrapods. Birds share with crocodilians, their nearest living relatives, similarities in joint architecture, including scapulohumeral and coracohumeral ligaments. The glenoid underwent a major reorientation during the evolution of the avian shoulder from the primitive condition of being posteroventrally directed as in Deinonychus antirrhopus and coelurosaurs generally to being dorsolaterally directed as in modern forms. The laterally facing glenoid of Archaeopteryx lithographica was intermediate in orientation and provided for a substantial degree of wing elevation but not the fully abducted, sagittal positioning that modern birds employ at the upstroke-downstroke transition.en_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.relation.hasversionhttp://earth.geology.yale.edu/~ajs/1993/11.1993.09Jenkins.pdfen_US
dash.licenseMETA_ONLY
dc.titleThe Evolution of the Avian Shoulder Jointen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalAmerican Journal of Scienceen_US
dash.depositing.authorJenkins, Farish
dc.date.available2019-01-04T16:57:30Z
dash.workflow.comments1Science Serial ID 3330en_US
dc.identifier.doi10.2475/ajs.293.a.253
dc.source.journalAmerican Journal of Science
dash.source.volume293;A
dash.source.page253-267
dash.contributor.affiliatedJenkins, Farish


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record