Re: Let's scrap it!

["Mickey Mortimer" <Mickey_Mortimer111@msn.com>]

David Marjanovic wrote-

> Apart from the K dinosaurs, the angiosperms from Liáoníng are evidence for
a
> K age -- and none of that K stuff occurs in the underlying Tuchengzi Fm
> which is LJ (contains *Archaeoceratops*).

No, Archaeoceratops is from the Xinminbao Group, which is Barremian.  You're
thinking of Chaoyangsaurus.  Incidentally, the Tuchengzi Formation is Late
Berriasian (Swisher et al., 2002).

>         Most of the K dinosaur groups, like Troodontidae, are known from
the
> J, just the specimens haven't been named apart from *Koparion*.

Not really, we have no Jurassic segnosaurs, oviraptorosaurs, pygostylians,
psittacosaurids or neoceratopsians, named or not.  Jurassic basal
coelurosaurs, enigmosaurs, troodontids and eumaniraptorans are known.  That
accounts for five of fourteen taxa, and is especially suspect given that all
of the "known from Jurassic" groups besides Troodontidae are large
clades/grades that were merely listed because the exact position of the
Yixian represntatives is controversial.

Mickey Mortimer