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Re: fused/unfused scap/coracoid
No. I'm talking about Protorosaurus versus Macrocnemus, Tanystropheus, etc.
As an aside, many large adult pterosaurs have unfused scap/coracoids, eg.
Nyctosaurus (here the smaller ones like N. nanus are fused, and the larger are
not), most Ornithocheirids save for one clade which has reacquired fusion.
Christopher Collinson wrote:
> Well there is probably a very simple answer to this but you're not going to
> like it. The simple answer is of course that you are assuming some of your
> daughter taxa are adult based on the disputable presence of embryos and
> neonates rather than on the osteological evidence. The specimens which show
> incomplete fusion of the scapula and coracoid are most probably not adults
> based on the osteological evidence and this would be a good time to
> re-evaluate the presence of the embryos in these specimens, which to my
> knowledge no one else has been able to independently confirm.
> ----- Original Message -----
> From: "david peters" <firstname.lastname@example.org>
> To: <email@example.com>
> Sent: Friday, July 30, 2004 3:03 PM
> Subject: fused/unfused scap/coracoid
> > I notice in some primitive diapsids (Protorsaurus and kin) that the
> scapula and coracoid are fused. This pair becomes unfused then fused again a
> few times in daughter taxa. Any thoughts on why this does or doesn't happen,
> especially in these early diapsid sprawlers?
> > David Peters
> > St. Louis