Edestus had teeth and gums near the back of the mouth which pushed the older teeth and gums forward, leading to some tooth-tastic oral display.
Edestus
Titanoboa was a huge snake and the worse predator on Earth. They were around 50 feet long and weighed 2,500 pounds.
Titanoboa
Pentecopterus decorahensis was a huge aquatic scorpion and it was around 5 feet long. It swam in Iowa around 460 million years ago.
Pentecopterus decorahensis
Hallucigenia fortis was a walking worm and it was able to walk on legs. However, it was less than 2 inches long.
Hallucigenia Fortis
Meganeura had a wingspan that was 2 feet wide and less adorable. They were an ancestor of dragonflies and their wingspans could top out a few inches.
Meganeura
Dunkleosteus could grow more than 30 feet long. They had unique jaws and could be opened and shut in a few milliseconds.
Dunkleosteus
Deinosuchus was an ancient crocodile that could battle the king of the dinosaurs. They were around 35 feet long and were native to North America.
Deinosuchus
Phoberomys pattersoni was a huge rat and was around 10 feet long with 5 feet of tail. However, they were herbivorous.
Phoberomys pattersoni
Anomalocaris was a shrimp that was a carnivorous shrimp and was around 6 feet long. They had tentacles with teeth.
Anomalocaris
Arcdotus was a bear and used to live in California around 10,000 years ago. They were carnivorous and needed 35 pounds of meat every day to stay alive.