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In contrast to their earth-bound relatives, tortoises, sea turtles do not have the ability to retract their heads into their shells. Their plastron, which is the bony plate making up the underside of a turtle or tortoise's shell, is comparably more reduced from other turtle species and is connected to the top part of the shell by ligaments without a hinge separating the pectoral and abdominal ...
Family [7] Genera [8] Common name(s) Example species Example image Carettochelyidae Boulenger, 1887: 1: Pig-nosed turtle: Pig-nosed turtle (Carettochelys insculpta) Cheloniidae Oppel, 1811: 6: Sea turtles: Green sea turtle (Chelonia mydas) Chelydridae Gray, 1831: 2: Snapping turtles: Alligator snapping turtle (Macrochelys temminckii ...
Sea turtles, along with other turtles and tortoises, are part of the order Testudines. All species except the leatherback sea turtle are in the family Cheloniidae. The superfamily name Chelonioidea and family name Cheloniidae are based on the Ancient Greek word for tortoise: χελώνη (khelōnē). [16]
The green sea turtle (Chelonia mydas), also known as the green turtle, black (sea) turtle or Pacific green turtle, [4] is a species of large sea turtle of the family Cheloniidae. It is the only species in the genus Chelonia . [ 5 ]
This category contains articles about the Sea turtle family. For taxon categorisation use Category:Chelonioidea. Pages in category "Sea turtles"
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.
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Dermochelyidae is a family of sea turtles which has seven extinct genera and one extant genus, containing one living species, the leatherback sea turtle (Dermochelys coriacea). The oldest fossils of the group date to the Late Cretaceous .