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BEIPIAOGNATHUS

a (dubious) meat-eating compsognathid dinosaur from the Early Cretaceous of China.
Pronunciation: bay-pyow-gna-thus
Meaning: Beipiao jaw
Author/s: Hu, Wang, and Huang (2016)
Synonyms: None known
First Discovery: Liaoning, China
Chart Position: 761

Beipiaognathus jii

Discovered in the Yixian Formation of China's western Liaoning Province, Beipiaognathus was coined on the strength of its un-serrated cone-shaped teeth, relatively long ulna, long and robust first finger and relatively short tail, and assigned to Compsognathidae based on what the authors assumed to be unique features of that group. However, fan-shaped spines on the back vertebra have been found in ornithomimosaurs, some alverzsauroids boast a robust first finger, and both features have been found amongst paravians, which are the dinosaurs most closely related to birds. But those aren't the only—or even the biggest—issues with Beipiaognathus.

Preserved on a stone slab, the holotype specimen of Beipioagnathus looks virtually "complete", but it's actually a mosaic of many different pieces glued together, and quite badly by all accounts, with some bones where they shouldn't be and others sprouting off at all manner of unnatural angles. And on top of that, the bone colors vary by more than a couple of shades from one part to the next. None of these issues would, well, be an issue if the authors had made any attempt to prove that all of the parts came from the same critter, or at least the same species. But their description was rather vague and their images not particularly crisp, which has led some palaeontologists to suspect that Beipiaognathus may be nothing more than a dirty stinking chimera.
Estimations
Timeline:
Era: Mesozoic
Epoch: Early Cretaceous
Stage: Aptian
Age range: 125-112 mya
Stats:
Est. max. length: 1.5 meters
Est. max. hip height: ?
Est. max. weight: 20 Kg
Diet: Herbivore
References
• Y. Hu, X. Wang, and J. Huang (2016) "A new species of compsognathid from the Early Cretaceous Yixian Formation of western Liaoning, China". Journal of Geology 40: 191-196 DOI: 10.3969/j.issn.1674-3636.2016.02.191.
• Andrea Cau: "Lo status (pale)ontologico di Beipiaognathus". Web access: 29th August, 2016.
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To cite this page:
Atkinson, L. "BEIPIAOGNATHUS :: from DinoChecker's dinosaur archive".
›. Web access: 18th Dec 2017.
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