Re: Trike fights

[Robert.J.Meyerson@uwrf.edu (Rob Meyerson)]

>In a message dated 96-01-25 11:21:20 EST, Robert.J.Meyerson@uwrf.edu (Rob
>Meyerson) writes:
>
>>Being somewhat analogous=
>> to a block-and-tackle we use for lifting heavy objects, the jaw muscle=
>> appears to originate at the middle of the jaw, slide along the jugal, then=
>> up to the frill for it's insertion. 
>
>What, the _outside_ of the jugal??

I think so.  The only opening in the skull, at that region, is the ear.  There
doesn't appear to be any way that the jaw muscle could attach to the underside
of the frill, so it had, IMHO, to attach to the upper frill (which is fairly
well supported by other sources).  Simply put, there is no where for the muscle
to go, except along the jugal and up to the frill.  If this is true,
reconstructions of these animals, that portray the jugal as an extra set of
horns, should be rethought (especially _Pentaceratops_).

Rob

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