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Dental caries in the fossil record: a window to the evolution of dietary plasticity in an extinct bear.


ABSTRACT: During the late Pleistocene of North America (?36,000 to 10,000 years ago), saber-toothed cats, American lions, dire wolves, and coyotes competed for prey resources at Rancho La Brea (RLB). Despite the fact that the giant short-faced bear (Arctodus simus) was the largest land carnivoran present in the fauna, there is no evidence that it competed with these other carnivores for prey at the site. Here, for the first time, we report carious lesions preserved in specimens of A. simus, recovered from RLB. Our results suggest that the population of A. simus from RLB was more omnivorous than the highly carnivorous populations from the Northwest. This dietary variation may be a consequence of different competitive pressures.

SUBMITTER: Figueirido B 

PROVIDER: S-EPMC5736623 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Dental caries in the fossil record: a window to the evolution of dietary plasticity in an extinct bear.

Figueirido Borja B   Pérez-Ramos Alejandro A   Schubert Blaine W BW   Serrano Francisco F   Farrell Aisling B AB   Pastor Francisco J FJ   Neves Aline A AA   Romero Alejandro A  

Scientific reports 20171219 1


During the late Pleistocene of North America (≈36,000 to 10,000 years ago), saber-toothed cats, American lions, dire wolves, and coyotes competed for prey resources at Rancho La Brea (RLB). Despite the fact that the giant short-faced bear (Arctodus simus) was the largest land carnivoran present in the fauna, there is no evidence that it competed with these other carnivores for prey at the site. Here, for the first time, we report carious lesions preserved in specimens of A. simus, recovered from  ...[more]

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