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Re: Sharovipteryx an ornithodiran??

To: david peters <davidrpeters@earthlink.net>
Subject: Re: Sharovipteryx an ornithodiran??
From: Nick Pharris <npharris@umich.edu>
Date: Wed, 25 Jan 2006 12:22:45 -0500
Cc: dinosaur@usc.edu
In-reply-to: <9968339.1138202055235.JavaMail.root@elwamui-norfolk.atl.sa.earthlink.net>
References: <9968339.1138202055235.JavaMail.root@elwamui-norfolk.atl.sa.earthlink.net>
Reply-to: npharris@umich.edu
Sender: owner-dinosaur@usc.edu

Quoting david peters <davidrpeters@earthlink.net>:

There are dinosaurs and there are crocodiliforms (Scleromochlus nests here) and together they comprise the sum total of the Archosauria (birds + crocs). Pterosaurs and Sharovipteryx are way off yonder in lizard land where the lateral digits are not reduced,

Um, lateral digits most certainly are reduced in pterosaurs. Manual digit V is *gone*, and pedal digit V is long (in basal forms), but composed of only 2 phalanges, implying reduction and secondary re-lengthening.

Nick Pharris
Department of Linguistics
University of Michigan

References:
- Sharovipteryx an ornithodiran??
  - From: david peters <davidrpeters@earthlink.net>

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