During the Triassic, all the continents were joined into a single landmass called Pangaea.

The heartlands of this supercontinent were so far from the ocean that they were parched deserts, but nearer the fringes there were lush, swampy forests.

One of the aquatic nothosaurs, Lariosaurus lived in shallow seas about 230 million years ago. It probably swam somewhat like an otter, but far less efficiently.

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