Congratulations!!! =8-) Impressive
list! 14 characters is more than the 13 for Alvarezsauria! ;-)
This may well be a symplesiomorphy,
and is probably reversed in the Ornithothoraces you mention. See http://www.cmnh.org/fun/dinosaur-archive/2001Jun/msg00342.html (scroll
down to almost the end) and your follow-up.
Apart from Compsognathidae and Mononykinae
at least. :-)
BTW, has someone meanwhile found out who
defined Pygostylia when? I haven't. Thanks in advance for
info.
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