Bipedal, and did not resemble the crocodile at all except for the shape of the head.
150,000,000 BC - Present
Lives in southeastern America. Usually lives for 35 to 50 years, and grows to a length of 10-15 feet during that time.
110,000,000 BC - 100,000,000 BC
40 feet long and 10-15 tons. Ate dinosaurs and fish near the rivers of modern day Africa. Looked and behaved like the crocodile, but twice as long and 10 times as heavy. Informally known as the, "super-croc".
100,000,000 BC - 95,000,000 BC
36 feet long and weighed roughly 10 tens. Oddly enough, it ate plankton and krill despite it huge pelican-like jaw.
80,000,000 BC - 70,000,000 BC
Lived in the rivers of modern day North America. Roughly 33 feet long and 10 tons, with a 6 foot long skull. Fed on fish, shellfish, and various land creatures. Fossils show that it attacked Tyrannosaurs.
70,000,000 BC - 50,000,000 BC
Five feet long and 25-50 pounds, ate fish and lived in the rivers of modern day North America and western Europe. Survived the mass extinction in 65,000,000 BC along with many of its relatives.
55,000,000 BC - Present
The modern day crocodile, which includes the saltwater, Nile, and American variants. They are spread throughout the world with various adaptations for specific climates and habitats.
23,000,000 BC - 40,000 BC
9 feet long and 500 pounds. Had very long legs unlike the modern crocodile's short legs. The crocodile continuously gets smaller due to environmental changes.
4,200,000 BC - Present
Very close relative of the modern day crocodile, large skull with a small raised rim in front of the eyes. Most likely hunted early human. Lived in the Turkana basin in Kenya and may be the largest known true crocodile.
Killed off 90% of life on Earth.
Largest mass extinction to ever.
Killed off 76% of life on Earth.
Killed the archosaurs with the exception of the crocodiles.
Killed off 75% of life on Earth.
Mass extinction currently active. Primarily caused by humans.
May prove to be more devastating than the Cretaceous-Tertiary Extinction.
Hunted to Near Extinction
1950 AD - 1960 AD
Humans started hunting the American Alligator for its hides, almost went extinct.