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Olfactory aspects of Pachycephalosauria

Hello all,

I know there is bloody little data and fossil material available for these
dome-headed creatures, especially for P. wyomingensis. I am seeking further
information for the olfactory lobes of the braincase, and any possible
relationship with the lenghtened snout in this species.

1. Was the nasal structure capable of  enough surface area to provide an
excellent sense of smell, and if so what particular features are present to
support this?

2. In relation to the rest of the braincase just how enlarged are the
olfactory lobes, and are these features representitive of the entire
Pachycephalosauria family?

3. Are the nerve pathways from the tounge to the brain known well enough to
tie the sense of taste to the sense of smell?

4. Is there a sexual dimorphism within P. wyomingensis in relationship to
these features. or is such dimorphism possible to determine?

Thanks in advance,
Roger A. Stephenson