When was the first Pteranodon fossil found?
Pteranodon
Pteranodon were pterosaurs, not dinosaurs. By definition, all dinosaurs belong to one of the two groups within Dinosauria, i.e. Saurischia or Ornithischia. As such, this excludes pterosaurs. Nonetheless, Pteranodon are frequently featured in dinosaur media and are strongly associated with dinosaurs by the general public.[2] While not dinosaurs, they form a sister clade to dinosaurs within the clade Avemetatarsalia.