[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Megaraptor

"*Megaraptor*" is supposedly the first South American dromaeosaur, and 
bigger than *Utahraptor*. Of that I have no doubt, but it is its 
classification that I doubt.

Firstly, only north Africa and Australia seem to see dromaeosaur 
fossils, and even those are doubtful, and could belong to a sister 
branch of the "raptors," or to dinosaurs similar to *Noasaurus*.

Secondly, I recall that *Baryonyx* was touted as being a super raptor 20 
ft+ long before Utahraptor was discovered, even while the spinosaurid's 
skeleton was being unearthed, which in the '90's (I believe) was 
something of a shock to myself when I first saw the bones in a 
children's book on dinosaurs -- Eyewitness.

This could be the same situation as in *Baryonyx*, so I doubt the South 
American super-raptor. The Asian and North American (Asiamericanan) 
raptors are known from many fossils, many times articulated, so we know 
that they were there; but for the European and far-east Asian, there 
isn't enough evidence (teeth) to base anything on, for they aren't 
diagnostic. I'm not saying for sure they weren't raptors, but Laurasia 
seems to be where all the valid dromaeosaurids have been found, and the 
troodontids, so I am having difficulty believing in Gondwanan raptors: 
the African, Australian, and South American "raptors" could all be 
spinosauroid, and England _was_ a part of North Africa at one point, as 
was half of Europe, then drifted north.

To support my thoery, there are supposed "spinosaurid" remains from 
South America anyway (*Angaturama,* *Irritator,* and *Asiamericana*) and 
it is feasible that a baryonychid may have come from the Argentine rocks 
of the Rio Neuquen Formation, a viable grave of dinosaurs. I don't know 
what formations those are from, aside from the Santana (*Irritator*), so 
"*Megaraptor*" _could_ be one of those, a plausible synonomy that 
should, in my opinion, be followed.

But anyway, "*Megaraptor*" having a 37cm (15 inches, without the keratin 
sheath, which would make almost 2 feet long) would make a 25ft+ raptor 
(given the benefit of the doubt, for I am ever optimistic) or a 30 ft 
(maybe) theropod of another type. And then there's *Noasaurus*, a 
raptor-like ornitholestoid from Argentina; as I've never seen the claw 
in question -- what if?

Get Your Private, Free Email at http://www.hotmail.com