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RE: The Croc That Wanted to Be a Dinosaur
Jaime Headden wrote:
Alternate title, from M. Keesey: "Crocs: The Original Dinosaurs"
The amount of convergence between Triassic archosaurs and later dinosaurs is
astonishing. Not just _Shuvosaurus_ as an ornithomimosaur-mimic
("ornithomimomimosaur"), but also tyrannosaur-mimics (_Postosuchus_),
ornithischian-mimics (revueltosaurs) and probably ornithurine-mimics
(_Protoavis_, or part of it). We can probably throw aetosaurs in the mix as
ankylosaur-mimics. Now, if can only figure out what those
pachcephalosaur-like domes from the Triassic of India really belong to...
(Chatterjee originally touted them as evidence for Triassic
As Mike Keesey noted, the forelimbs of_Effigia_ are extremely short. Is
_Effigia_ the first incontrovertible evidence for obligate bipedality in the
Suchia? I know the sphenosuchians include some gracile taxa that had an
erect gait, but they were probably facultative bipeds at best (and I'm not
sure if _Hallopus_ was a biped.) Same for ornithosuchids.
It is also notable that many of tese features, as suggested by Nesbitt
Norell, are found in various Chinle archosaurs, such as the
Nesbitt and Norell also suggest that the Argentine archosaur _Sillosuchus_
might belong to this group.
There is a family Chatterjeeidae Long and Murry, 1995. So even if
_Chatterjeea_ is a junior synonym of _Shuvosaurus_, then Chatterjeeidae
remains as an available family name.
Note that not only is *Lagerpeton* included is a phylogeny testing the
placement of various crurotarsans, but so is *Marasuchus* and both are
dinosauromorphans. Technically, so is Pterosauria....
Darn... just as Dave Peters had convinced me that pterosaurs were lizards.
Finally, Nesbitt and Norell note that this data provides evidence that
cranial elements of *Shuvosaurus* belong to postcranial elements described
I don't want to tread on any corns... but I wonder how _Gojirasaurus_ fits
into all of this, given its proposed chimeric nature. Again, I don't have
an opinion either way on this.