Post by Supersaurus on Sept 6, 2009 17:03:13 GMT -5
To be honest, I've never studied much on Nanotyrannus. I don't know if those differences you mentioned would be because it's a different species altogether or simply a juvenile?
I do know that proportions and general shape of a juveniles skull changes as it grows (in most animals), but maybe there're too many differences as you say for this explaination. I will have to do some studying on this one.
I think that it is a juvi. A juvi of what, I don't know honestly.
When "Jane" was found, they did tests on the bones- and they found her to be only 11 years old when she died. This would leave us to think that she is a juvi.
But there are differences in the brain case, and a small back section of the skull (which its specific name escapes me right now.) The case now in jane was found smashed, so it didn't really give a difinitive answer. So honestly, that cannot be compleatly taken into account. As far as I know, no CT scans have been done on the "Cleaveland" skull. Janes, and that one are the only two in exsistance.
The other differences, I feel, can be summed up with the juvi theory. The tooth count. the shoulders. Everything seems to be in line with growth. The teeth would grow in size as it got older- thus making the too count smaller. Certain things would grow faster than others in the body- the same is true for any other animal.
The Burpee Museum of Rockford, Illinois has indeed found yet ANOTHER one, named Peaty. I actually found one of the toe bones two years ago. If a skull is found, in good condition... it could help this debate out quite a bit. Because really the only thing saying this is another animal, to ME that is, is the interesting indentation in the skull towards the back. I will try and get pics of said dent when I can, so that you all can see what I'm talking about....