RE: Pterosaur diversity (was: Re: Waimanu)

[Michael Mortimer <mickey_mortimer111@msn.com>]

Tim Williams wrote-

> _Ceratops_ (the nominative genus for Ceratopsidae) is probably an invalid 
> genus (nomen dubium).  Sereno (2005) is confident that _Ceratops montanus_ 
> belongs to the Chasmosaurinae, based on the size of the horn cores.  In 
> fact, he is so confident that he renames this subfamily the Ceratopsinae.  
> Let's hope that big brow horns are limited to chasmosaurines/ceratopsines 
> among ceratopsians.

Zuniceratops and Ryan's (still undescribed?) basal centrosaurine show this 
isn't so.  Large brow horns are plesiomorphic for ceratopsomorphs.

Mickey Mortimer