Correlates between calcaneal morphology and locomotion in extant and extinct carnivorous mammals. (11th June 2017)

• Record Type: Journal Article
• Authors: Panciroli, Elsa; Janis, Christine; Stockdale, Maximilian; Martín‐Serra, Alberto
• Is Part Of: Journal of morphology. Volume 278:Number 10(2017)
• Page Start: 1333
• Page End: 1353
• Publication Date: 2017-06-11
• Subjects: calcaneum -- Carnivora -- ecomorphology -- locomotion -- morphometrics; Morphology -- Periodicals; Physiology -- Periodicals; Anatomy -- Periodicals; 571.3
• DOI: 10.1002/jmor.20716
• Languages: English
• ISSNs: 0362-2525

Abstract

Abstract: Locomotor mode is an important component of an animal's ecology, relating to both habitat and substrate choice (e.g., arboreal versus terrestrial) and in the case of carnivores, to mode of predation (e.g., ambush versus pursuit). Here, we examine how the morphology of the calcaneum, the 'heel bone' in the tarsus, correlates with locomotion in extant carnivores. Other studies have confirmed the correlation of calcaneal morphology with locomotion behaviour and habitat. The robust nature of the calcaneum means that it is frequently preserved in the fossil record. Here, we employ linear measurements and 2D‐geometric morphometrics on a sample of calcanea from eighty‐seven extant carnivorans and demonstrate a signal of correlation between calcaneal morphology and locomotor mode that overrides phylogeny. We used this correlation to determine the locomotor mode, and hence aspects of the palaeobiology of, 47 extinct carnivorous mammal taxa, including both Carnivora and Creodonta. We found ursids (bears), clustered together, separate from the other carnivorans. Our results support greater locomotor diversity for nimravids (the extinct 'false sabertooths', usually considered to be more arboreal), than previously expected. However, there are limitations to interpretation of extinct taxa because their robust morphology is not fully captured in the range of modern carnivoran morphology. Abstract : We employ linear measurements and 2D geometric morphometrics to examine how the morphology of the calcaneum, the 'heel bone', correlates with locomotion in extant carnivores. We use these correlations to determine the locomotor mode, and hence aspects of the probable palaeobiology, of 47 extinct taxa including members of Carnivora and Creodonta.