Caenagnathids etc

["Tim Williams" <T.Williams@cclru.randwick.unsw.edu.au>]

Theropod taxonomy seems to be the flavour of the month, so I'd like 
to clarify a few things that have been bugging me.

Firstly, are caenagnathids the same as elmisaurids?  In other words, 
do the mandibles named _Caenagnathus_ belong to the same group of 
theropods as the postcranial bones assigned to the Elmisauridae?
(I believe H.-D. Sues has a _Chirostenotes_ partial skeleton 
including a braincase that may resolve this - anybody else heard about
this?)

Secondly, is _Erectopus_ an abelisaurid, or a relative of 
_Poekilopleuron_?

Thirdly, what is _Koparion_?

Thanks
Tim
Sydney, Australia