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Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles. [1] Before Pappochelys was discovered and Eunotosaurus was redescribed, [2] Odontochelys was considered the oldest undisputed member of Pantestudines (i.e. a stem-turtle).
Trionychidae is a family of turtles, commonly known as softshell turtles or simply softshells.The family was described by Leopold Fitzinger in 1826. Softshells include some of the world's largest freshwater turtles, though many can adapt to living in highly brackish waters.
Turtle skulls vary in shape, from the long and narrow skulls of softshells to the broad and flattened skull of the mata mata. [25] Some turtle species have developed large and thick heads, allowing for greater muscle mass and stronger bites. [26] Turtles that are carnivorous or durophagous (eating hard-shelled animals) have the most powerful bites.
The Yangtze giant softshell turtle (Rafetus swinhoei), also commonly known as the Red River giant softshell turtle, the Shanghai softshell turtle, the speckled softshell turtle, and Swinhoe's softshell turtle, is a critically endangered species of turtle in the family Trionychidae. It is regarded as one of the largest living freshwater turtle ...
The common snapping turtle, as its name implies, is the most widespread. [4] The common snapping turtle is noted for its combative disposition when out of the water with its powerful beak-like jaws, and highly mobile head and neck (hence the specific epithet serpentina, meaning "snake-like"). In water, it is likely to flee and hide underwater ...
This exceeds the size of the Vienna-specimen of the Cretaceous sea turtle Archelon, the largest known turtle, (carapace length 2.20 meters). [ 4 ] The weight of Stupendemys was estimated based on the straight carapace length, with calculations indicating a weight of 871 kg for CIAAP-2002-01 and 744 kg for MCZ(P)-4376, the former largest known ...
Carettochelyidae is a family of cryptodiran turtles belonging to the Trionychia. It contains only a single living species, the pig-nosed turtle (Carettochelys insculpta) native to New Guinea and Northern Australia.
Cryptodira is commonly called the "Hidden-Neck Turtles" or the "Inside-Neck Turtles". Cryptodira differ from Pleurodira (side-necked turtles) in that they lower their necks and pull the heads straight back into the shells, instead of folding their necks sideways along the body under the shells' marginals.