In a message dated 2/13/02 5:12:45 PM Eastern Standard Time, tholtz@geol.umd.edu writes: > Deinonychosauria > Troodontidae > Sinovenator > all later troodontids > Dromaeosauridae > Sinornithosaurus > all later dromaeosaurids Does the last category include _Microraptor_? --Nick P.