[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: late night thoughts: misunderstand what?
Don Ohmes wrote:
2). The record of sauropods in general seems to be one of increasing size,
Ummm... maybe not.
The gist of this is that although most sauropod lineages included big (VERY
big) taxa, these same lineages tended to end with smaller taxa.
Does the way the sauropod record fizzled out (in terms of diversity)
falsify the notion that no >matter how big a given long-neck got, the
bipeds just got taller, and the TBJ's finally 'won'?
Regarding sauropod diversity, I wouldn't say this is necessarily true. It
is true that most Late Cretaceous sauropods belong to a single group: the
Titanosauria. However, the titanosaurs were a VERY diverse group, both
phylogenetically and morphologically (by sauropod standards). The fact that
most LK sauropods have been traditionally lumped into a single family
("Titanosauridae") has tended to understate what a diverse clade the
Titanosauria actually was.
Make every IM count. Download Messenger and join the i?m Initiative now.
It?s free. http://im.live.com/messenger/im/home/?source=TAGHM_June07