RE: dinosaur humps

["T. Mike Keesey" <tmk@dinosauricon.com>]

On Sat, 11 Mar 2000, Tracy Ford wrote:

> > Actually, *no* ornithischian have elongated vertebral spines except for
> > hadrosauroids and I think some coronosaurs, both very derived lineages and
> > hardly the place to look for features linking ornithischians to other
> > groups
>
> Ok, I'll bite, whats a coronosaur?

Coronosauria == {_Protoceratops_ + _Triceratops_}
see http://dinosauricon.com/taxa/coronosauria.html

I was referring to the elonagted caudal spines of some "protoceratopsids".

> What about Ouranosaurus,

hadrosauroid

> Vectiosaurus (Iguanodon),

Perhaps I should extend it to iguanodontoids (=hadrosauriforms). I have
this genus listed as a synonym of _Iguanodon atherfieldensis_, but Lord
knows _Iguanodon_ could use some reevaluation.

_I. hollingtonensis_ is another long-spined species I forgot.

> a new tall spined ornithopod from North America?

Probably an iguanodontoid of some kind, I'm guessing.

-- T. Michael Keesey .................................. <tmk@dinosauricon.com>
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