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Predicting euarchontan body mass: A comparison of tarsal and dental variables.

dc.contributor.author Boyer, Douglas
dc.contributor.author Yapuncich, Gabriel
dc.contributor.author Gladman, Justin T
dc.date.accessioned 2019-02-26T17:00:56Z
dc.date.available 2019-02-26T17:00:56Z
dc.date.issued 2015-07
dc.identifier.issn 0002-9483
dc.identifier.issn 1096-8644
dc.identifier.uri https://hdl.handle.net/10161/18081
dc.description.abstract Multiple meaningful ecological characterizations of a species revolve around body mass. Because body mass cannot be directly measured in extinct taxa, reliable body mass predictors are needed. Many published body mass prediction equations rely on dental dimensions, but certain skeletal dimensions may have a more direct and consistent relationship with body mass. We seek to evaluate the reliability of prediction equations for inferring euarchontan body mass based on measurements of the articular facet areas of the astragalus and calcaneus.Surface areas of five astragalar facets (n = 217 specimens) and two calcaneal facets (n = 163) were measured. Separate ordinary least squares and multiple regression equations are presented for different levels of taxonomic inclusivity, and the reliability of each equation is evaluated with the coefficient of determination, standard error of the estimate, mean prediction error, and the prediction sum of squares statistic. We compare prediction errors to published prediction equations that utilize dental and/or tarsal measures. Finally, we examine the effects of taxonomically specific regressions and apply our equations to a diverse set of non-primates.Our results reveal that predictions based on facet areas are more reliable than most linear dental or tarsal predictors. Multivariate approaches are often better than univariate methods, but require more information (making them less useful for fragmentary fossils). While some taxonomically specific regressions improve predictive ability, this is not true for all primate groups.Among individual facets, the ectal and fibular facets of the astragalus and the calcaneal cuboid facet are the best body mass predictors. Since these facets have primarily concave curvature and scale with positive allometry relative to body mass, it appears that candidate skeletal proxies for body mass can be identified based on their curvature and scaling coefficients.
dc.language eng
dc.publisher Wiley
dc.relation.ispartof American journal of physical anthropology
dc.relation.isversionof 10.1002/ajpa.22735
dc.subject Calcaneus
dc.subject Talus
dc.subject Tooth
dc.subject Animals
dc.subject Primates
dc.subject Body Size
dc.subject Anthropology, Physical
dc.subject Fossils
dc.subject Female
dc.subject Male
dc.title Predicting euarchontan body mass: A comparison of tarsal and dental variables.
dc.type Journal article
dc.date.updated 2019-02-26T17:00:56Z
pubs.begin-page 472
pubs.end-page 506
pubs.issue 3
pubs.organisational-group Trinity College of Arts & Sciences
pubs.organisational-group Duke
pubs.organisational-group Evolutionary Anthropology
pubs.organisational-group Staff
pubs.publication-status Published
pubs.volume 157


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