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A large number of species have been assigned to Prognathodon, though the genus is widely considered to be paraphyletic. [24] The incomplete nature of Prognathodon specimens has resulted in an incomplete understanding of the systematics of the genus as a whole, including both the alpha-level diversity and generic characteristics.
The genus contains a single species, G. stadtmani, considered a species of the related Prognathodon up until its 2020 redescription. [2] It was a large mosasaur measuring 10.5 metres (34 ft) long. [3] Gnathomortis was originally named as a species of Prognathodon in 1999. [3]
This convexity is not as pronounced as in most Prognathodon species and rather resembles that in Mosasaurus and P. kianda. The coronoid bears a large posterior process oriented vertically, which gives the dorsal margin of the bone an angle of nearly 90° between the horizontal anterior end and the vertical hind wing.
Jormungandr is a large mosasaur. The holotype skull measures 72 centimeters (28 in) in total length and the lower jaw is 80.8 centimeters (31.8 in) long. [2] Based on these measurements, Zietlow and colleagues estimated a total body length of 5.4–7.3 meters (18–24 ft). [3] [4] Size of Jormungandr compared to a human
Thalassotitan ("titan of the seas") is an extinct genus of large mosasaurs (a group of extinct marine lizards) that lived during the late Maastrichtian of the Cretaceous period in what is now Morocco, around 67 to 66 million years ago.
Mosasaurus lived alongside other large predatory mosasaurs also considered apex predators, most prominent among them being the tylosaurines and Prognathodon. [ 25 ] [ 67 ] Tylosaurus bernardi , the only surviving species of the genus during the Maastrichtian, measured up to 12.2 meters (40 ft) in length [ 134 ] while the largest coexisting ...
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A third tribe, the Prognathodontini (Prognathodon and its closest relatives, such as Plesiotylosaurus), is also used on occasion. [6] "Clidastini" or the adjective "clidastine" is also used sometimes, but generally refers to an adaptive grade close to and containing the genus Clidastes, rather than an actual clade. [9]