Among the several subclasses (or " orders" in biology) of reptiles are snakes and lizards, turtles and tortoises, crocodiles and alligators, and the tuatara, a marine lizard in New Zealand.
The Ginkgo tree, platypus, echidna, coelacanths, nautlius, horseshoe crabs… and of course: the tuatara, the sole remaining member of a branch of reptiles that originated 200 million years ago.