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Mazon creek fossils - General Fossil Discussion - The Fossil Forum

Some teeth of the megalodon were up to 18 cm long

Triadobatrachus is an extinct genus of frog-like amphibians, including only one known species, Triadobatrachus massinoti. It is the oldest member of the frog lineage known, and an excellent example of atransitional fossil. It lived during the Early Triassic about 250 million years ago, in what is now Madagascar.

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World Class, Red Iridescent Hoploscaphities Ammonite

World Class, Red Iridescent Hoploscaphities Ammonite From South Dakota.

Two Anhanguera reptiles fly above as a Kaprosuchus reptile confronts an Agustinia dinosaur.

Megalolamna paradoxodon is the name of a new extinct shark named by an international research team that based its discovery on fossilized teeth up to 4.5 centimeters (1.8 inches) tall found from the eastern and western United States (California and North Carolina), Peru and Japan.