Re: Rapetosaurus stuff

[christopher robert noto <crnoto@midway.uchicago.edu>]

> (vegitated flood plain with big rivers) to the Hell Creek. So, the question 
> would then be "Why did titanosaurs, if they were coming from Asia, avoid 
> vegitated floodplains in the northern part of NA, but settle in vegitated 
> floodplains in southern NA?" To me, that wouldn't make much sense for the 
> animals to do that. Personally, the idea of NA titanosaurs coming from Asia 
> would make more sense if we had any evidence of any titanosaurs north of 
> Utah.

Perhaps all that we have evidence left of is a "remnant population" of the
last surviving titanosaurs in NA while the ones we would expect to find
evidence of farther north had gone extinct, maybe due to competitive
exclusion of some type.  Who knows?  There may have been several migration
episodes and all we have evidence of is this one small, late arriving 
group that was maybe able to only establish itself in this aprt of NA.

Chris