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Soc. open sci."],"published-print":{"date-parts":[[2023,9]]},"abstract":"<jats:p>\n                    The forelimbs of hominoid primates (apes) are decidedly more flexible than those of monkeys, especially at the shoulder, elbow and wrist joints. It is tempting to link the greater mobility of these joints to the functional demands of vertical climbing and below-branch suspension, but field-based kinematic studies have found few differences between chimpanzees and monkeys when comparing forelimb excursion angles during vertical ascent (upclimbing). There is, however, a strong theoretical argument for focusing instead on vertical descent (downclimbing), which motivated us to quantify the effects of climbing directionality on the forelimb kinematics of wild chimpanzees (\n                    <jats:italic>Pan troglodytes<\/jats:italic>\n                    ) and sooty mangabeys (\n                    <jats:italic>Cercocebus atys<\/jats:italic>\n                    ). We found that the shoulders and elbows of chimpanzees and sooty mangabeys subtended larger joint angles during bouts of downclimbing, and that the magnitude of this difference was greatest among chimpanzees. Our results cast new light on the functional importance of downclimbing, while also burnishing functional hypotheses that emphasize the role of vertical climbing during the evolution of apes, including the human lineage.\n                  <\/jats:p>","DOI":"10.1098\/rsos.230145","type":"journal-article","created":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T03:05:29Z","timestamp":1693969529000},"update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Downclimbing and the evolution of ape forelimb morphologies"],"prefix":"10.1098","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4810-4442","authenticated-orcid":true,"given":"Luke D.","family":"Fannin","sequence":"first","affiliation":[{"name":"Department of Anthropology, Dartmouth College, Hanover, NH 03755, USA"},{"name":"Ecology, Evolution, Environment and Society, Dartmouth College, Hanover, NH 03755, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mary S.","family":"Joy","sequence":"additional","affiliation":[{"name":"Department of Anthropology, Dartmouth College, Hanover, NH 03755, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5916-418X","authenticated-orcid":true,"given":"Nathaniel J.","family":"Dominy","sequence":"additional","affiliation":[{"name":"Department of Anthropology, Dartmouth College, Hanover, NH 03755, USA"},{"name":"Department of Biological Sciences, Dartmouth College, Hanover, NH 03755, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"W. 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