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Theropod Systematics

Tom Holtz called for a question on theropod systematics so here goes!
Does the association of a  Caenagnathus jaw with a Chirostenotes skeleton 
(reported by Hans-Dieter Sues in the 1994 JVP abstracts) 
prove the synonomy of Caenagnathidae and Elmisauridae? Does the monophyly 
of the Oviraptorosauria (Oviraptoridae + Caenagnathidae) still stand? If 
so does this mean that the arctometarsalian condition arose twice in 
non-avian theropods?
These questions intrigue me and I hope Tom or someone else can provide 
some answers.

Adam Yates
School of Zoology
La Trobe University
Bundoora, 5083, Aust.
e-mail: zooamy@zoo.latrobe.edu.au