re: I could go on...
I used to be a Pennsylvanian, too... but now I'm in this basin. I don't know whether it's Permian, or merely a temporary relocation.
If no one else is swallowing your puns from the DavinianDevonian Era, maybe they're biting too high, and should trilobites instead. Perhaps, with all their Ediaciarian, they believe themselves to be on a higher stratum. Too intent on making the Pleisto scene to go slumming with the like of us...
Anyway -- I think it was more a case of jellyfish bouncing each other that caused the Cambrian explosion.