Re: troodontids and tympanic recesses

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

SeanSt8579@aol.com wrote-

> So I was at work the other day looking at Chiappe's (in Witmer & Chiappe
> 2002) character matrix on page 466, and noticed that he had troodontids
down as
> having a tympanic recess that invades the columellar. So far as I was
aware,
> this was still a good avian synapomorphy.
>
> Wanting to check it out, I noticed that the scoring was composite. So I
dont
> have to wade through all those papers, does anyone know offhand which
species
> he's talking about, and the relevant cite?

>From my analysis-

54. caudal typanic recess opens into the columnar recess (Chiappe et al.,
1996)
 0- Tyrannosauridae (Makovicky and Norell, 1998; 1 in Norell et al., 2001)
 Ornithomimidae (Makovicky and Norell, 1998)
 Erlikosaurus (Clark et al., 1994)
 ?Caenagnathidae (Holtz, 2000)
 Oviraptoridae (Makovicky and Norell, 1998; Clark et al., 2002)
 ?Dromaeosaurus (Norell et al., 2001)
 ?Deinonychus (Norell et al., 2001)
 Velociraptor (Barsbold and Osmolska, 1999)
 ?IGM 100/1015 (Norell et al., 2001)
 1- Mononykinae (Chiappe et al., 1998)
 Sinovenator (Xu et al., 2002)
 Byronosaurus (Makovicky et al., 2003)
 Troodon (Currie, 1985; 0 in Norell et al., 2001)
 Archaeopteryx (Chiappe et al., 1998)
 Patagopteryx (Chiappe, 2002)
 Ornithurae (Chiappe et al., 1998)

Mickey Mortimer