Edited (04/14/23)   With all of the new discoveries over the past few years there is very little out there that is current or accurate.   Here is my view of the Dinosaurian/Crocodilian fauna from the Hell Creek and Lance Formation excluding Avialae.   Let me add that the lack of a large dataset or complete specimens leaves many unanswered questions for many of these genera.   New discoveries will be needed to firm up a any listing of the fanual listing     Tyra