Elbow Joint Geometry in Bears (Ursidae, Carnivora): a Tool to Infer Paleobiology and Functional Adaptations of Quaternary Fossils

@article{Meloro2017ElbowJG,
  title={Elbow Joint Geometry in Bears (Ursidae, Carnivora): a Tool to Infer Paleobiology and Functional Adaptations of Quaternary Fossils},
  author={Carlo Meloro and Alessandro Marques de Oliveira},
  journal={Journal of Mammalian Evolution},
  year={2017},
  volume={26},
  pages={133-146}
}
Bears are currently represented by eight species among Carnivora. Being all particularly large and generally plantigrade limits to certain extent their functional morphology so that inferences about their past diversification are difficult to achieve. We analyzed variation in bears’ elbow joint size and shape to reconstruct paleobiology of Quaternary fossil species. By using 2D geometric morphometrics, we were able to discriminate with high degree of accuracy species, locomotor and habitat… 
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References

SHOWING 1-10 OF 115 REFERENCES
Feeding habits of extant and fossil canids as determined by their skull geometry
TLDR
Both skull size and shape are excellent predictors of feeding habits in Canini and provide information about fossil taxonomic affinities, and discriminant function analysis successfully classify extant Canini in dietary groups with 89% of accuracy.
Ecomorphological correlates of craniodental variation in bears and paleobiological implications for extinct taxa: an approach based on geometric morphometrics
TLDR
Results reveal a set of shared craniodental traits among the herbivorous bears, including short and vaulted skulls with well-developed zygomatic arches, lateralized orbits and small canines, concave jaws with a highly positioned condyle, large moment arms for the temporalis and masseter muscles, and long cheek teeth.
Ecomorphology of Radii in Canidae: Application to Fragmentary Fossils from Plio-Pleistocene Hominin Assemblages
TLDR
This study uses morphometry of the radius in extant carnivorans of the dog family (Canidae) to predict adaptation to prey size and introduces a new method for quantifying canid habitat adaptations based on the geographic distributions of the extant species sampled.
Feeding Habits of Plio-Pleistocene Large Carnivores as Revealed by the Mandibular Geometry
TLDR
A complete geometric morphometric survey of mandible of large (>7 kg) Carnivora is presented in order to make paleoecological predictions for selected Plio-Pleistocene taxa.
Locomotor adaptations in Plio-Pleistocene large carnivores from the Italian Peninsula: Palaeoecological implications
Mammalian carnivores are rarely considered for environmental reconstructions because they are extremely adaptable and their geographic range is usually large. However, the functional morphology of
Cats in the forest: predicting habitat adaptations from humerus morphometry in extant and fossil Felidae (Carnivora)
Abstract Mammalian carnivores are rarely incorporated in paleoenvironmental reconstructions, largely because of their rarity within the fossil record. However, multivariate statistical modeling can
Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis
TLDR
The mandibular morphology of cave bears was analysed using 3D geometric morphometrics and compared to that of extant Ursidae, implying the development of morphological adaptations for eating foliage.
Ecomorphological indicators of feeding behaviour in the bears (Carnivora: Ursidae)
TLDR
Comparison of patterns of morphological variation and patterns of phylogenetic relationships among species revealed surprisingly strong congruence between morphology and phylogenetics.
Functional morphology of the cave bear (Ursus spelaeus) cranium: a three-dimensional geometric morphometric analysis
TLDR
The cranial morphology of U. spelaeus was analysed using 3D geometric morphometrics and compared to that of extant Ursidae, and results suggest that the diet of the fossil bear Ursus spelaeus likely consisted mostly of foliage.
Postcranial morphology and the locomotor habits of living and extinct carnivorans
TLDR
The authors' ANOVA results reveal consistent differences in postcranial skeletal morphology among locomotor groups, with cursorial and arboreal species more accurately classified than terrestrial, scansorial, or semiaquatic species.
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