In a message dated 3/18/01 6:30:45 PM Eastern Standard Time, tmk@dinosauricon.com writes: > _Pterosauromorpha_ == Clade(_Pterodactylus_ <-- _Iguanodon_) Better make this Clade(_Pterodactylus_ <-- _Iguanodon_, _Megalosaurus_), since it has been suggested in the past that pterosaurs are closer to theropods than to ornithischians. --Nick P.