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Paleothyris was about 1 foot (30 centimeters) long and outwardly resembled a lizard (the animal's colors are not known, and the colors shown in the picture above are however speculations based on modern lizards). However anatomically, Paleothyris did not have the openings in its skull (fenestrae) that are found in lizards and most other amniotes (today, the only surviving amniotes without fenestrae are turtles and tortoises).
Paleothyris had large eyes aand is therefore thought to have been a noctural (at night). It had sharp teeth, and scientists speculate it probably lived on forest floors. It is thought that perhaps it hunted insects, and, maybe other small animals as well.
Paleothyris was an early reptile that lived about 300 million years ago
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