Re: More on the data used in classification

["Chris Fisher" <killerraptor20@hotmail.com>]

> http://www.sciencemag.org/feature/data/1041760.shl

According to this (Sereno's) analysis, if I am interpreting it correctly, 
then the following have a semilunate carpal made up of two carpals ( 2 
separate element ):
Allosauridae
Therizinosauridae ( I thought Alxasaurus had 2 separate carpals, but others 
have one single element )

The following have a semilunate carpal made up of one carpal ( I would say = 
two carpals fused into one semiluante-shaped element ):
Ornithomimidae ( I thought it was degenerate in this group - single carpal 
"block" in same place as maniraptorans but indistinct in shape )
Oviraptoridae
Troodontidae
Dromaeosauridae
Birds / Aves


Not known for the following:
Ornitholestes ( wrist unknown - removed to Coelurus? )
Compsognathidae ( wrist unknown? - but I thought it was known for 
Sinosauropteryx )
Alvarezsauridae ( probably because forelimb is so transformed? )
Tyrannosauridae ( I thought it was degenearted as in ornithomimids - though 
I think one )immature/subadult specimen shows semilunate condition of one 
fused element ).
Caenagnathidae ( wrist unknown? )

Is this correct ?? Many of Sereno's views appear to differ from Thomas 
Holtz's

_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp