Thought this might be a good add on;
Cretaceous Crocodile Packed a Mean Crunch
Crikey! That's Godzilla's head!
Researchers in Argentina have unearthed the 135-million-year-old remains of a ferocious dino-crocodile nicknamed "Godzilla."
Officially named Dakosaurus andiniensis, the ancient crocodilian had a head like a T-rex and a tail like a fish. It lived in an ocean that once covered much of Argentina, and its massive jaws and serrated teeth gave it the ability to tear apart pretty much any other creature in the sea. According to one of the researchers, "Godzilla wasn't nice at all, and was certainly the top ocean predator of his time."
Lead researcher Zulma Gasparini, a paleontologist at Argentina's National University of La Plata, first began studying Godzilla nine years ago. She found the nearly complete fossil skull of the never-before-seen species in 1996, after Argentine farmers brought ancient bone fragments to a local museum. Nearly a decade of subsequent research led to a paper this week in the journal Science--and to a shot on the cover of next month's National Geographic.
Roughly 13 feet (4 m) long, Godzilla was smaller than some modern saltwater crocs, which can grow to 30 feet (9 m). But his massive crunch made up for his relatively small size. Most ancient crocodilian species had long snouts full of small, sharp teeth, great for feasting on fish and other small prey. Godzilla's broader snout, powerful jaws, and saw-like teeth probably served a different purpose: chomping off chunks of larger prey. That didn't save the species from extinction, but at least one of its fearsome features lives on. Today, broader snouts grace the kind of crocodilians known as alligators.