RE: Ontogenetic stages in thyreophorans

[Tim Williams <twilliams_alpha@hotmail.com>]

Nick Gardner wrote:

> Outside of the juvenile examples of stegosaurs described by Galton in the 
> 80s (i.e. _Omosaurus_, _Stegosaurus_, "Astrodon"),
> _Liaoningosaurus_ (Xu et al. 2001), the baby nodosaurid described by
> Jacobs et al. (1996), _Pinacosaurus_ (? Hill et al 2003, I think), and 
> _Euoplocephalus_ (Coombs, 1986); are there any other examples of
> non-adult thyreophorans?

_Anoplosaurus curtonatus_ is another, I believe.  The lack of armour (the 
reason behind the "anoplo" portion of the genus name) is possibly 
ontogenetic.  Suberbiola and Barrett (1999) find _A. curtonatus_ to be a 
valid genus and species of ankylosaur...

Suberbiola, X.-P., and Barrett, P.M. (1999). A systematic review of 
ankylosaurian dinosaur remains from the Albian of England. Special Papers in 
Palaeontology 60: 177-208.

Cheers

Tim

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