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Archelon is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring 4.6 m (15 ft) from head to tail and 2.2–3.2 t (2.4–3.5 short tons) in body mass.
Megalochelys ("great turtle") is an extinct genus of tortoises that lived from the Miocene to Pleistocene.They are noted for their giant size, the largest known for any tortoise, with a maximum carapace length of over 2 m (6.5 ft) in M. atlas.
The family includes some of the largest sea turtles that ever existed. The largest, Archelon , had a head one metre (39 in) long. Like most sea turtles, they had flattened bodies and flippers for front appendages; protostegids had minimal shells like leatherback turtles of modern times.
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In Texas, there are many areas where you can watch turtles bask in the hot sun and swim in the fresh, shallow water. Use this handy guide Their slow-moving mannerisms and rigid shield make them ...
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The largest known turtle ever was Archelon ischyros at 5 m (16 ft) long and 2,200 kg (4,900 lb). [283] Possible second-largest sea turtle was Protostega at 3.9 m (13 ft) in total body length. [284] [285] There is even a larger specimen of this genus from Texas estimated at 4.2 m (14 ft) in total length.
The alligator snapping turtle is the largest freshwater turtle in North America and one of the larger freshwater turtles in the world. One record sized individual with a 31.5-inch (80 cm) shell has been documented, and another 251-pound (114 kg) captive specimen recorded, however, 35–100 pounds (16–45 kg) and 12–20 inches (30–51 cm) is ...