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And all of this will be elaborated on, in time: this was meant to be the briefest and simplest of introductions.
For previous Tet Zoo articles on turtles, see...
Gilbert White's pet tortoise, and what is 'grey literature' anyway?
The familiar Matamata, known to us all since the 1700s, and its long, fat neck (matamatas part II)
"Adaptation perfected" (possibly) in a turtle's head (matamatas part III)
Necks for sex? No thank you, we're sauropod dinosaurs (includes brief discussion of Galapagos tortoises)