Pterosaur
Pterosaurs were an extinct group of flying reptiles in the clade Pterosauria that lived during much of the Mesozoic Era.
Pterosaurs were an extinct group of flying reptiles in the clade Pterosauria that lived during much of the Mesozoic Era. They were the first vertebrates known to have evolved powered flight and went extinct at the end of the Cretaceous period. Despite common misconceptions, pterosaurs were not dinosaurs.
Evolution and timeline
Pterosaurs appeared in the Late Triassic, roughly 215–228 million years ago depending on the source, and persisted until the end of the Cretaceous about 66 million years ago. They diversified over a long span of Mesozoic time before disappearing in the same mass extinction that affected non-avian dinosaurs.
Flight and anatomy
Pterosaurs were the first vertebrates to evolve powered flight. Their wings were made from a skin-and-tissue membrane supported by an elongated fourth finger, and many species had hollow bones that reduced weight.
Diversity and size
The group included a broad range of forms, from small species to giant azhdarchids with very large wingspans. Pterosaurs occupied varied ecological roles, including fish-eating, insect-eating, and other feeding strategies.
Relationship to dinosaurs
Pterosaurs lived alongside dinosaurs but were a separate reptile lineage. They are often called 'flying dinosaurs' in popular usage, but that label is scientifically inaccurate.
Key facts
- Pterosaurs are an extinct clade of reptiles, not dinosaurs.
- They are the earliest vertebrates known to have achieved powered flight.
- They first appeared in the Late Triassic and survived until the end-Cretaceous extinction event.
- The group included a wide size range, from very small forms to some of the largest animals ever to fly.
- Pterosaur fossils have been found on multiple continents, indicating a broad global distribution.
Canadian museums, universities, and parks frequently feature pterosaur fossils and exhibits in discussions of prehistoric life, especially in broader Mesozoic paleontology and public science education.
Frequently asked questions
What is a pterosaur?
Were pterosaurs dinosaurs?
When did pterosaurs live?
How did pterosaurs fly?
What caused their extinction?
References
- Wikipedia — https://en.wikipedia.org/wiki/PterosaurSupports: Definition of pterosaurs, broad time range, and identification as the first vertebrates known to evolve powered flight.
- Natural History Museum — https://www.nhm.ac.uk/discover/the-truth-about-pterosaurs.htmlSupports: Late Triassic appearance, end-Cretaceous extinction, and mass-extinction context.
- American Museum of Natural History — https://www.amnh.org/explore/news-blogs/what-is-a-pterosaurSupports: Pterosaurs as flying reptiles, their relationship to dinosaurs, and powered flight.
- Encyclopaedia Britannica — https://www.britannica.com/animal/pterodactylSupports: Use of pterodactyl as an informal term for a subgroup and the Late Jurassic to Late Cretaceous time range for that subgroup.
- Science News Explores — https://www.snexplores.org/article/lets-learn-about-pterosaursSupports: Global distribution, diversity, and first-vertebrate-flight description.