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Communication Dans Un Congrès Année : 2015

High-resolution CT scanning and 3-D cranial analyses reveal hidden anatomical, phylogenetic, and functional information

Résumé

Our research team and collaborators have combined application of traditional comparative morphology and skull measurement methods with innovative non-destructive CT scanning 3-D virtual imaging and computer-based biomechanical modeling techniques in Carnivora, Anthropoidea, and extinct Meridungulata, revealing insights that cannot be garnered solely by studying external anatomy or discrete characters. Analyses focused on investigating brain evolution, inner ear structures, and inferences of locomotion, auditory acuity, and vision in fossils. Case studies will show the utility of high resolution 3-D CT imaging, geometric morphometrics (GM), and finite element (FE) biomechanical modeling analyses from our current NSF research (DEB-1257572) incorporating an integrated approach to studying phylogeny, form, and function of Carnivora and kin. Results include: 1) brain endocast reconstructions of basal carnivoramorphans to determine timing, number of events and order of acquisition of neocortex expansion features; 2) a new computational method for FE model convergence analyses (strain energy, bite force) in mastication scenarios across different sampling regimes for 1 skull; 3) evidence for strong phylogenetic signal in craniodental form and function, but also links between extant dietary groups and cranial mechanical properties after accounting for phylogeny; 4) a refined simulation approach for reconstructing dietary capability from a morpho-functional linkage model tying morphology directly to predicted dietary groups; and 5) testing correlations between bony labyrinth 3D GM landmark data and body size, phylogeny, and locomotor ecology in the Musteloidea.
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hal-03608950 , version 1 (15-03-2022)

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  • HAL Id : hal-03608950 , version 1

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John J Flynn, Camille Grohé, Michelle Spaulding, Z Jack Tseng. High-resolution CT scanning and 3-D cranial analyses reveal hidden anatomical, phylogenetic, and functional information. 95th annual meeting of the American Society of Mammalogists, Jun 2015, Jacksonville, United States. ⟨hal-03608950⟩
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