TORTOISES

The Kama Sutra of chelonian sex has yet to be written.

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Chelonians (order Testudines) include the turtles, tortoises, and terrapins. They are reptiles with a shell enclosing the body and a solid-roofed skull. The earliest chelonians date from the late Triassic period, over 200 million years ago.

CLASSIFICATION
Kingdom Animalia (animals)
Phylum Chordata
Subphylum Vertebrata (vertebrates)
Superclass Tetrapods (four limbs)
Class Reptilia (reptiles)
Subclass Anapsida
Order Testudines (=chelonia: turtles, tortoises, and terrapins).