Hainosaurus

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Hainosaurus
Temporal range: Late Cretaceous, 70.6–66Ma
Hainosaurus bernardi.JPG
Skull, Natural History Museum of Bruxelles
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Sauropsida
Order:Squamata
Family:Mosasauridae
Subfamily:Tylosaurinae
Genus:Hainosaurus
Dollo, 1885
Species
 
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Hainosaurus
Temporal range: Late Cretaceous, 70.6–66Ma
Hainosaurus bernardi.JPG
Skull, Natural History Museum of Bruxelles
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Sauropsida
Order:Squamata
Family:Mosasauridae
Subfamily:Tylosaurinae
Genus:Hainosaurus
Dollo, 1885
Species

Hainosaurus is an extinct genus of marine lizard belonging to the mosasaur family. It is one of the largest mosasaurs, though its size has been revised more than once. At first it was estimated to be 17 metres (56 ft), and the largest mosasaurid.[1] During the 1990s, its size was revised to 15 metres (49 ft) long;[2] more recently, Johan Lindgren estimated that it reached lengths of up to 12.2 metres (40 ft).[3] It was one of the top marine predators of the Late Cretaceous. Like other giant mosasaurs, this giant predator preyed on turtles, plesiosaurs, pterosaurs, cephalopods, sharks, fish, and smaller mosasaurs.

Restoration
Specimen MNHN 1896-15 jaw fragments, MNHN, Paris

Hainosaurus is a member of the subfamily Tylosaurinae, and it is related to the wholly North American Tylosaurus. However, it has more vertebrae from the neck to the part of the tail with chevrons (53) than Tylosaurus (35).[citation needed] Both genera are large marine superpredators. Hainosaurus' tail has less chevron-bearing vertebrae, making it shorter than that of Tylosaurus. The only known and type species of Hainosaurus is H. bernardi, named after the Belgian Léopold Bernard, owner of the phosphate chalk exploitation where the fossil was unearthed.[4]

References[edit]

  1. ^ Russell, D. A. 1967. Systematics and morphology of American mosasaurs (Reptilia, Sauria). Yale Univ. Bull 23:241. pp.
  2. ^ Lingham-Soliar, T. 1998. Unusual death of a Cretaceous giant. Lethaia 31:308–310.
  3. ^ Johan Lindgren (2005) The first record of Hainosaurus (Reptilia: Mosasauridae) from Sweden. Journal of Paleontology: Vol. 79, No. 6, pp. 1157-1165
  4. ^ Dollo, L., 1891. La vie au sein des mers. Paris, Librairie J.B. Baillière et Fil