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Re: Tiny dinosaur on verge of swearing off meat
Quoting Janet m vandenburgh <firstname.lastname@example.org>:
> Tiny dinosaur on verge of swearing off meat
> Thu Oct 23, 2008 7:13pm EDT
> CHICAGO (Reuters) - A rare juvenile skull of a 190 million-year-old dinosaur
> may help explain when an important group of plant eaters branched off from
> carnivorous cousins, U.S. and British researchers said on Thursday.
> The tiny skull belonged to a young Heterodontosaurus...
Does the presence of fangs necessarily indicate carnivory to any degree? They'd
have been just as
useful for defense against predators in a fully-fledged herbivore.
Do heterodontosaur fangs have serrations? It'd seem odd for a dinosaur to
possess canine-like (ie
non-serrated) fangs specifically for eating meat, rather than the typical
serrated blade-like teeth
characteristic of theropods. Did the carnivorous ancestors of heteros also have
'fangs'? If not, then
they would appear to be an adaptation unique to heteros - therefore something
through positive selection rather than something passively retained from their
GIS / Archaeologist http://geo_cities.com/dannsdinosaurs
Melbourne, Australia http://heretichides.soffiles.com