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Re: Lizards with deltopectoral crests?
David R. Peters wrote-
If anyone knows whether Chlamydosaurus is unique in this regard, or not,
I would be happy to hear from them. Just how widespread are those
squarish deltopectoral crests?
The dpc appears to be low and subtriangular in Scleromochlus (Benton, 1999),
low and gently bump-like in Megalancosaurus (Paul 2002, Harris & Downs
2002), and rather subtriangular in Longisquama (Peters 2003). I don't know
anything about the condition in lepidosauromorphs. As far as pterosaurs go,
indeterminate in Austriadactylus (Dalla Vecchia et al. 2002); triangular in
Jeholopterus, Preondactylus, Peteinosaurus, and Dimorphodon; squarish in
Batrachognathus and Anurognathus; and rounded in Dendrorhynchoides (Dalla
On a secondary note, I've been impressed by the similarity in overall
body shape of Longisquama + the most basal pterosaurs to modern lemurs.
Short cervical series. Tail elevated at a high angle from the dorsal
series. Etc. This convergence, of course, gives further credence to
Bennett's modern hypothesis of an arboreal leaping origin to pterosaurs
which follows similar hypotheses from decades ago. If anyone would like
to discuss these convergences we can do so, either privately or
Do you have a reference for Bennett's hypothesis? I'm currently looking for
pterosaur and prolacertiform papers and would like to know what's out there
as I'm looking. I think we should have a public discussion.
Are there any pterosaur mailing lists out there, similar to the DML, except
I've noticed that people also often state that some of the new Chinese
dromaeosaurs are lemur-like (Microraptor zhaoianus and NGMC 91, for
example). Are their cervical series shorter than most other eumaniraptorans
as well? Just a curiousity, I know it's irrelevant to the current
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