There is only one surviving species in this order, the others having become extinct 100 million years ago.
| Family Sphenodontidae Tuatara Sphenodon punctatus, once found throughout New Zealand, now lives only on small islands off the coast of the North Island. This primitive, lizard-like reptile has teeth fused to the edges of the jaws (not set in sockets), a rudimentary third eye on top of the head and no copulatory organ. |
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