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RE: Rv: noasaurus reconstruction




Sebastian Apesteguia wrote:

Velocisaurids in South America and Madagascar

F. AGNOLÍN, F. NOVAS and S. APESTEGUÍA

[snip]

Velocisaurus and Masiakasaurus share slender metatarsals II and IV, and very gracile and non-
raptorial pedal phalanges with a long dorsal process. These features, which distinguish them from >other abelisauroids, prompts the inclusion of the latter within Velocisauridae.

Unless... these features are primitive for Abelisauroidea? Or convergent between _Velocisaurus_ and _Masiakasaurus_? How does _Elaphrosaurus_ fit in?


(Playing Devil's Advocate here.)

_Velocisaurus_ and _Masiakasaurus_ do share slender metatarsals II and IV. _Masiakasaurus_ has metatarsal II narrower than both III and IV, as does _Noasaurus_ and (I think) _Elaphrosaurus_.

_Velocisaurus_ has metatarsals II and IV narrower than III. The latter condition is fairly typical of theropods, although this is exaggerated in _Velocisaurus_ where the shafts of metatarsals II and IV are extremely thin.

Cheers

Tim

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