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RE: Predatory Psittacosaurus?
Anthony Docimo wrote:
>> Is there evidence to support an omnivorous diet in Psittacosaurs?
> besides raiding an oviraptor's nest?
Wasn't it _Protoceratops_ that was 'framed'?
Anyways, a herbivorous diet is usually favored for psittacosaurs. For example,
Averianov &c (2006) state: "The slicing psittacosaur dentition with
self-sharpening, cutting edges is clearly suitable for processing of plant
material (Sereno 1990b, 1997). Abundant gastroliths, often associated with
_Psittacosaurus_ skeletons (Sereno 1990b, 1997; Xu 1997; Mayr et al. 2002; PM
TGU 16/4-21) are also indicative of a herbivorous diet."
I would say the craniodental morphology may certainly support herbivory, but
the presence of gastroliths is ambiguous at best (some basal tetanuran
theropods have them too).
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