[qimg]http://i64.photobucket.com/albums/h188/axxman300/lizardman%20obama_zpsooqooitw.jpg[/qimg]
I made this in Photoshop class last year because I knew it would eventually end up on this board.
So let me recap, UFOs are crewed by a reptile race that evolved concurrently with ours.
It might be plausible if the science was better. Dinosaurs suffered 3 extinctions which were total. There are huge gaps of time in between Epochs, it's only been 65 million years since T-Rex and his Cretaceous buddies expired. That's not a long time.
The ocean itself is not reptile friendly. The other problem with your evolution theory is that it's not consistent with the reptiles that have evolved to live in the ocean. Primates use tools, we see this more and more, and it makes them consistent with our evolutionary tree, as is their social structures.
Face it, on this board, poo is flung as frequently as it is in the jungles.