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Temporal range: Cenomanian-Turonian, 100–93 Ma
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Superfamily: Mosasauroidea
Family: Mosasauridae
Genus: Haasiasaurus
Polcyn et al., 2003
H. gittelmani
Binomial name
Haasiasaurus gittelmani
(Polcyn et al., 1999)

Haasia Polcyn et al., 1999 (preoccupied)

Haasiasaurus is an extinct genus of early mosasaur, originally named "Haasia" by M. J. Polcyn et al.,[1][2] in honour of the palaeontologist Georg Haas. (The original name was a junior homonym of Haasia Bollman, 1893, a genus of millipedes.) Haasiasaurus was the largest cenomanian mosasaur at 2.5 metres (8.2 ft). The genus contains the species Haasiasaurus gittelmani, which was found in the Cenomanian 100 million years ago (Upper Cretaceous) rocks near Ein Yabrud, in the Palestinian West Bank, approximately 20 kilometres (12 mi) north of Jerusalem.[3]


  1. ^ "†Haasiasaurus Polcyn et al. 2003". Paleobiology Database. Fossilworks. Retrieved 17 April 2016.
  2. ^ Michael J. Polcyn, Eitan Tchernov & Louis L. Jacobs (2003). "Haasiasaurus gen. nov., a new generic name for the basal mosasaurid Haasia Polcyn et al., 1999". Journal of Vertebrate Paleontology. 23 (2): 476–476. doi:10.1671/0272-4634(2003)023[0476:HGNANG]2.0.CO;2.
  3. ^ Michael J. Polcyn, Eitan Tchernov & Louis L. Jacobs (1999). "The Cretaceous biogeography of the eastern Mediterranean with a description of a new basal mosasauroid from 'Ein Yabrud, Israel". In Y. Tomida, T. H. Rich & P. Vickers-Rich (ed.). Proceedings of the Second Gondwanan Dinosaur Symposium. National Science Museum Monographs. 15. Tokyo. pp. 259–290.