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Because well-preserved Pteranodon skull fossils are extremely rare, researchers use stratigraphy (i.e. which rock layer of the geologic formation a fossil is found in) to determine species identity in most cases. Pteranodon sternbergi is the only known species of Pteranodon with an upright crest.
The first fossils of Pteranodon sternbergi were collected by American paleontologist George F. Sternberg in 1952 from the lower portion of the Niobrara Formation.The fossils of the animal looked similar to those of the species Pteranodon longiceps, but the crests were set upright and in a slightly different position.
In 1876, Marsh had described the first skull specimen of Pteranodon, which as unearthed by American paleontologist Samuel Wendell Williston in the Smoky Hill River, located in the Wallace County (now Logan County) of Kansas, USA. Later that year, another skull specimen was found, though this time a bit smaller in size. [19]
Fossils of Pteranodon have been found with tooth marks from sharks such as Squalicorax, [191] and a fossil with tooth marks from the Toolebuc formation has been interpreted as being attacked or scavenged by an ichthyosaur (most likely Platypterygius).
He also criticized the length of Pteranodon's crest in Marsh's 1884 reconstruction of the specimen YPM 1177 as being too speculative given the quality of its preservation. [67] Williston speculated that Pteranodon-like fossils would be one day discovered in Europe, and that in this case Pteranodon was probably a junior synonym of Ornithostoma. [68]
The fossil, which was unearthed in the Fayum Depression of Egypt’s Western Desert, is the most complete skull of the hyaenodonta subfamily Hyainailourinae to be found in Africa.
Bae said that his analysis suggested that the Dragon Man skull is a better match with fossils found at Chinese sites in Dali in Shaanxi province in and Jinniushan, Liaoning province in 1978 and ...
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.
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