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Quetzalcoatlus (/ k ɛ t s əl k oʊ ˈ æ t l ə s /) is a genus of azhdarchid pterosaur that lived during the Maastrichtian age of the Late Cretaceous in North America. The type specimen, recovered in 1971 from the Javelina Formation of Texas, United States, consists of several wing fragments and was described as Quetzalcoatlus northropi in 1975 by Douglas Lawson.
Most species of azhdarchids are still known mainly from their distinctive neck bones and not much else. The few azhdarchids that are known from reasonably good skeletons include Zhejiangopterus and Quetzalcoatlus. Azhdarchids are also distinguished by their relatively large heads and long, spear-like jaws.
Unpublished remains attributed to Hatzegopteryx suggest that it had a proportionally short, deep beak, grouping with the "blunt-beaked" azhdarchids rather than the "slender-beaked" azhdarchids, the latter containing Quetzalcoatlus sp. (now known as the species Q. lawsoni [11]). [12]
A prehistoric species of water lettuce, previously assigned to the genus Pistia. C. hickeyi: Another Cobbania species from pond sediments known as "Licking Leaves." [132] Cornophyllum: C. newberryi: The majority of leaves are entire-margined but some may develop a few teeth. [125] "Cypercites" "C." sp: A reed-type plant. Dryophyllum: D. subfalcatum
Reconstructed skeleton of Quetzalcoatlus in the Arizona Museum of Natural History in Mesa Arizona. It was once thought that competition with early bird species might have resulted in the extinction of many of the pterosaurs. [144] It was thought that by the end of the Cretaceous, only large species of pterosaurs were present (no longer true ...
Cryodrakon rivaled Quetzalcoatlus, which also inhabited North America at the time, as the largest of the pterosaurs, which were cousins of the dinosaurs. Both had large heads with large toothless ...
Azhdarchoidea (/æʒdɑːrˈkɔɪdɪːə/, meaning "azhdarchid-like forms") is a group of pterosaurs within the suborder Pterodactyloidea.Pterosaurs belonging to this group lived throughout the Early and Late Cretaceous periods, with one tentative member, Tendaguripterus, that lived in the Late Jurassic period.
Unwin defined the group as the most recent common ancestor of Pterodaustro guinazui and Quetzalcoatlus northropi, and all its descendants. [8] This group was named for the presence of a head crest in most known species, though this feature has since been found in more primitive pterosaurs and was probably an ancestral feature for all ...