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Re: Irritator as Spinosaur
In a message dated 96-01-31 17:24:45 EST, pharrinj@PLU.edu (Nicholas J.
>About the only things Sereno used to link spinosaurs and megalosaurs are
>a short antebrachium and a large thumb claw.
>I do not think it impossible that the Spinosauria are a (mostly)
>Gondwanan radiation of piscivorous troodont relatives. More is needed to
>show this, however, particularly a good, hard look at _Baryonyx_ and
>description of the new _Spinosaurus_ material.
The relatively long dorsal centra and winglike transverse processes of
_Spinosaurus_ suggest a ceratosaurian derivation for Spinosauria. But I
haven't checked for these features on _Baryonyx_.