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Another related misconception is that the pterodactyl is a dinosaur. In fact, it is a pterosaur which is a separate clade from the dinosaurs. Unlike the dinosaurs, the pterosaurs really are extinct. When science videos refer to “the asteroid that killed the dinosaurs” they should really say “pterosaurs” instead, it would be more educational on multiple levels.
A lot more than the pterosaurs died out though. Most archosaurs, including the sauropods and the non-avian theropods, are gone. The ichthyosaurs and the majority of ancient crocodilians went extinct too (not dinosaurs, but related). So it's kind of odd to mention pterosaurs but not those others.
Also Dimetrodon is not a dinosaur