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Sinosaurus (Theropoda) tooth loss pathology from Lower Jurassic of China (free pdf)



From: Ben Creisler
bcreisler@gmail.com


A new online paper in open access. You may need to add the .pdf
extension to open it, however.


LiDa Xing, Phil R. Bell, Bruce M. Rothschild, Hao Ran, JianPing Zhang,
ZhiMing Dong, Wei Zhang & Philip J. Currie (2013)
Tooth loss and alveolar remodeling in Sinosaurus triassicus
(Dinosauria: Theropoda) from the Lower Jurassic strata of the Lufeng
Basin, China.
Chinese Science Bulletin (advance online publication)
DOI: 10.1007/s11434-013-5765-7
http://link.springer.com/article/10.1007/s11434-013-5765-7

Pathological or traumatic loss of teeth often results in the
resorption and remodeling of the affected alveoli in mammals. However,
instances of alveolar remodeling in reptiles are rare. A remodeled
alveolus in the maxilla of the Chinese theropod Sinosaurus (Lower
Jurassic Lower Lufeng Formation) is the first confirmed example of
such dental pathology in a dinosaur. Given the known relationship
between feeding behavior and tooth damage in theropods (teeth with
spalled enamel, tooth crowns embedded in bone) and the absence of
dentary, maxillary, and premaxillary osteomyelitis, traumatic loss of
a tooth is most likely the cause of alveolar remodeling. Based on the
extent of remodeling, the injury and subsequent tooth loss were
non-fatal in this individual.