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Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, [3] are reptiles of the order Testudines and of the suborder Cryptodira.The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, Kemp's ridley, and olive ridley.
Turtles have been classified in different ways by different authors. While they were previously considered anapsids , they are now considered more derived. [ 1 ] Recent analyses of molecular evidence have strongly suggested that they belong in the clade Archosauromorpha (also known as Archelosauria). [ 2 ]
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 ...
Sea turtles, and several extinct forms, have evolved a bony secondary palate which completely separates the oral and nasal cavities. [30] The necks of turtles are highly flexible, possibly to compensate for their rigid shells. Some species, like sea turtles, have short necks while others, such as snake-necked turtles, have long ones.
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) Dermatemydidae Gray, 1870 : 1: Central American river turtle: Central American river turtle (Dermatemys mawii ...
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 ]
The olive ridley sea turtle (Lepidochelys olivacea), also known commonly as the Pacific ridley sea turtle, is a species of turtle in the family Cheloniidae. The species is the second-smallest [ 4 ] [ 5 ] and most abundant of all sea turtles found in the world.
This category contains articles about the Sea turtle family. For taxon categorisation use Category:Chelonioidea. Pages in category "Sea turtles"
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