Giant Cartillaginous fish of the Paleozoic.
Adding to my list of favourites, Im adding a few of yours a day now
Holy crap! Parahelicoprion was HUGE!
Parahelicoprion is one weird looking shark..
I was going to say you missed one (Orodus), but luckily decided to look it up and apparently it "only" grew to 7ft. Here I thought it was 20ft due to Evolving Planet.