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Re: Long-necked stegosaur coming out in Proceedings B
David Marjanovic wrote:
> So _Kentrosaurus_ had paired spines on the hips, and
> 'Gigantspinosaurus' had them on the shoulders?
Thanks for the info, David.
The referred, articulated specimen of _Tuojiangosaurus_ has spines preserved in
the scapular region (expanded base of spine positioned over the proximal end of
the scapula). A referred specimen of _Huayangosaurus_ is also reported to have
a pair of spines preserved in the pectoral region. So these two stegosaurs
apparently have parascapular spines (shoulders), rather than parasacral spines
(hips). Given the morphology of the iliac blade in _Kentrosaurus_, parasacral
spines make sense (and is one of the reasons why _Kentrosaurus_ was originally
restored with parasacral spines).
Galton & Upchurch (in the Stegosauria chapter of Dinosauria II) mention that
_Wuerhosaurus_ has parascapular spines too. This would seem to undermine this
genus' referral to _Stegosaurus_ (which is one of the few stegosaurs that
clearly doesn't have either parascapular or parasacral spines).
> > BTW, isn't the name 'Gigantspinosaurus' a valid
> genus? I had thought the original description (by
> Ouyang) is considered to be valid, including by Susannah
> Maidment's recent stegosaur papers.
> No idea, I haven't read most of the relevant papers.
Hmmm... why then did you say that the description of this genus was "_still_
Meor Hakif wrote:
> Could the long neck of this stegosaur be useful in
> confusing predators, so that they become unsure which is the
> end to be avoided (ie. the tail with the thagomizer). I
> think some arthropods use this kind of head or tail mimicry.
> It would be far more confusing if they lived in large
Somebody (was it Thulborn?) once proposed this idea for ankylosaurids - that
the terminal tail club, when held erect, would give the animal the appearance
(silhouette) of a sauropod from a distance. The idea didn't get a whole lot of