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Re: Notarium question
On Mon, Aug 18, 2003 at 01:23:06PM +0200, David Marjanovic scripsit:
> > The pterosaur notarium articulation is a new structure, that is, one
> > not present on Ichthyostega. I'm trying to think of other such
> > examples in tetrapods, but I'm coming up almost blank.
> There aren't many, AFAIK. The mammalian 2nd jaw joint ( = only jaw
> joint in the crown group, between squamosal and dentary) is one. And
> the teeth on the palatal rami of the premaxillae of *Haptodus*
> - - pmx teeth are normal, teeth on the palate are normal, but palatal
> teeth on the pmx are AFAIK unique. (Unfortunately. A few denticles on
> mine would be very practical for munching hard stuff like cornflakes.
> :-} )
> Or do you mean new bones, too? Could the sternum be one, er, two?
Ceratopsian rostral bone is not found in Ichthyostega, too.
firstname.lastname@example.org | Uton we hycgan hwaer we ham agen,
| ond thonne gedhencan he we thider cumen.
| -- The Seafarer, ll. 117-118.