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Re: Ouranosaurus - how many species? Other "spino"-Igaunodontids?

B tH <soylentgreenistrex@yahoo.com> wrote:
> Always thought it was kind of weird
> these guys would appear ... is this the only known genus in
> the group with spines?

_Dollodon_, from the Early Cretaceous of Belgium, has them too.  According to 
Paul (2008): "Neural spines of dorsals, sacrals and caudals form moderately 
tall sail."  So _Dollodon_ had a sail, but not as tall as that of 
_Ouranosaurus_.  (The _Dollodon_ holotype [IRSNB 1551] was previously referred 
to _Iguanodon_.  The taxonomy of 'iguanodonts' is still in a state of flux, 
including the status of the genus _Dollodon_; so we'll see where IRSNB 1551 
ends up.)

The very large iguanodont _Lanzhousaurus_, from the Early Cretaceous of China, 
also has rather tall dorsal neural spines - but perhaps not tall enough to 
support a sail.