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Re: Deinocheirus, and spinosaur systematics
> Sereno et omnia refer the type and most referred material of _Spinosaurus
> maroccanus_ to _S. aegyptiacus_, and cannot distinguish _Cristatusaurus_
> from _Baryonyx_ on anatomical grounds.
Sereno et al. also sink _Sigilmassasaurus brevicollis_ into the
species _Carcharodontosaurus saharicus_, claiming that the differences
cited by Russell between the two (all of which pertain to the
cervicals) are questionable.
They also suggest that _Angaturama limai_ is a junior synonym of
_Irritator challengeri_ (with the material perhaps coming from the
same individual!), but Sereno et al. are not the first to say this
(as they note).
Add to that their assertions that _Cristatusaurus lapparenti_ and
_Spinosaurus maroccanus_ are nomina dubia, and Sereno and co have
sent four dinosaur species to the chopping block. All were named in
the past ten years.
By the way, anybody have a species name for Owen's _Suchosaurus_ from
> Oh, and there now is a morphological feature by which spinosaur teeth can be
> distinguished from crocodilian teeth: the enamel of spinosaurs have a
> characteristic wrinkled texture (Milner has described this in some of her
> Oh, and for measurement freaks, the femur of _Suchomimus_ is 1075 mm,
> putting it into _Daspletosaurus_ and _Gorgosaurus_ (and young
> _Tyrannosaurus_) range.
> More later,
> Thomas R. Holtz, Jr.
> Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
> Dept. of Geology Email:email@example.com
> University of Maryland Phone:301-405-4084
> College Park, MD 20742 Fax: 301-314-9661