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Re: [dinosaur] Dinosauria reclassification joins Ornithischia and Theropoda in Ornithoscelida
Gesendet: Freitag, 24. März 2017 um 07:50 Uhr
Von: "Mike Habib" <firstname.lastname@example.org>
> it may be worth considering if the supinated forelimb anatomy in dinosaurs
> was mostly a side effect of the specific pathway they took for forelimb
To have the forelimbs locked in a supinated position is plesiomorphic.
Crocodiles have this condition, *Acanthostega* has it. It is actually hard to
get rid of while staying quadrupedal. Its persistence in theropods certainly
rules out certain hypotheses on what theropod forelimbs were used for before
flying became fashionable, but it doesn't itself require an explanation.