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Re: Nyctosaurus dorsal frill



----- Original Message -----
From: "David Peters" <davidrpeters@earthlink.net>
To: <dinosaur@usc.edu>
Sent: Sunday, March 23, 2003 9:00 AM
Subject: re: Anurognathus dorsal frill


> Nick Gardner wrote:
>
> You've mentioned this term several times on list in your posts, so could
> you
> explain what a "dorsal frill" is?
>
>
>
> Nick Gardner
> Paleoartist
> AIM CloudRaptor05
>
> "And then the cat, the dirty theif, ran away with the dish and the
> spoon..."
>
>
> In Longisquama, it has long been accepted, that a frill of several
> extraordinarily long (feather-like) (scale-like) plumes arose from the
> dorsal sector of the vertebral series. About three years ago I published
> that Longisquama, along with Sharovipteryx, Cosesaurus and other
> Prolacertiforms were sister taxa to the Pterosauria. Recent work (as yet
> unpublished) describing the posterior of Longisquama, the prepubis of
> Sharovipterys, etc. confirms that association.
>
> Knowing that the most primitive known pterosaur MPUM 6009 (currently
> referred to as a juvenile Eudimorphodon ranzii (Wild 1978)), and
> therefore a sister taxon to Longisquama, also had a lot of "stuff" (=
> funny-looking matrix) over its dorsal series, I opened my mind to the
> possibility of an overlooked frill and suddenly _there_ it was. Then I
> looked at Eudimorphon ranzii and _there_ it was. Then I looked at a
> dozen other specimens and every time it appeared. The dorsal frill
> actually occupies the cervical, dorsal and sacral series, as in
> Longisquama. It appears to be present in Zhejiangopterus and Nyctosaurus
> with no reduction in size, so it appears to be universal.
>

OK, I'll bite.  Can you point me to a particular specimen of Nyctosaurus
that exhibits the frill?

Chris


S. Christopher Bennett, Ph.D.
Assistant Professor of Basic Sciences
College of Chiropractic
University of Bridgeport
Bridgeport, CT 06601-2449