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The Pterosauria order was divided into two suborders. The first was the Rhamphorhynchoidea, which had teeth and long tails, and didn't have bony crests. The second was the Pterodactyloidea, and they had very short tails, many types were toothless, and many types did have elaborate bony crests. The Pterodactyloidea evolved from the Rhamphorhynchoidea during the Jurassic, so technically most scientists consider Pterodactyloidea to be a subgroup of Rhamphorhynchoidea.

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Q: What are two basic groups of pterosaurs?
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