The Outlaw Torn said:
But wouldn’t some species of dinosaur be classified as “reptilian” even if not same type of enemy reptilian.
Sure, however that's not what the conspiracy is about.
The enemy reptilian aliens aren't really reptilian in the sense as to what is considered reptilian here on Earth.
They just happen to look reptile like with the scaled skin, slit eyes and other biological traits that we classify as reptile, however I am 100% certain their DNA has no overlap with any reptile species originating from Earth, neither the dinosaurs, nor any others present today, so they are only defined by us as reptilian because that is what happens to describe their physical appearance best.
Same as we call the greys as we do, because they are grey creatures, both physically and energetically.