[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
ichthyosaurs & sauropterygians
I'm pretty convinced now that choristoderes are archosauromorphs (and
even Dilkes says the case for excluding them from Sauria is weak).
So I am now tackling the more difficult question of where to place
Thalattosaurs, Ichthyosauromorphs (apparently incl. Hupehsuchus) and the
Although sauropterygians seem to be saurians, there seems to be a very
big split on whether they are lepidosauromorphs or archosauromorphs. And if
thalattosaurs and ichthyosaurs end up in the same saurian clade as
sauropterygians, there would still be the problem of deciding if all three
of these groups form a single euryapsid subclade or not.
Anyone have any particularly strong synapomorphies they feel indicates
whether they are lepidosauromorphs or archosauromorphs?
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com