What’s the difference between Pteranodons, Pterosaurs, and Pterodactyls?

Question

What’s the difference between Pteranodons, Pterosaurs, and Pterodactyls?

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Answer 1

Pterosaurs were a large category of species within the category of reptiles. Pteranodon was a smaller, more specific category within Pterosauria. Pterodactyl (*Pterodactylus antiquus*) was the first species of pterosaur ever found, and came to be a colloquial name for the whole group.