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BookmarkTurtles are reptiles of the order Testudines (all living turtles belong to the crown group Chelonia), most of whose body is shielded by a special bony or cartilagenous shell developed from their ribs.
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The Order Testudines includes both living and extinct species, the earliest turtles being known from the early Triassic Period, making turtles one of the oldest reptile groups, and a much more ancient group than the lizards and snakes.
About 300 species are alive today.
Some species of turtles are highly endangered..
For more information about the topic Turtle, read the full article at Wikipedia.org, or see the following related articles:
Sea turtle — Sea turtles are found in all the world's oceans with the exception of the Arctic Ocean, and some species travel between oceans. The Flatback turtle ... > read more
Snapping turtle — Snapping turtles (or snappers) are large, New World freshwater turtles of the family Chelydridae. Snapping turtles are noted for their powerful ... > read more
Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Turtle at Wikipedia.org. See the Wikipedia copyright page for more details.
