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Temporal range: Late Cretaceous
Illustration of the A. dalmaticus holotype
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Superfamily: Mosasauroidea
Family: Aigialosauridae
Genus: Aigialosaurus
Kramberger, 1892
  • A. dalmaticus Kramberger, 1892 (type)
  • A. bucchichi Kornhuber, 1901

Opetiosaurus Kornhuber, 1901

Restoration of A. bucchichi
Restoration of A. dalmaticus

Aigialosaurus is an extinct genus of mosasauroid within the family Aigialosauridae. Its fossils have been found in Europe. It contains two species, Aigialosaurus dalmaticus and Aigialosaurus bucchichi.[1] According to recent molecular and morphological data, Aigialosaurus is the oldest known member of the lineage leading to large Cretaceous marine reptiles called mosasaurs, a group most closely related to snakes among living squamates.[2][3]


  1. ^ Dutchak, Alex R.; and Caldwell, Michael W. (2009)."A redescription of Aigialosaurus (= Opetiosaurus) bucchichi (Kornhuber, 1901) (Squamata: Aigialosauridae) with comments on mosasauroid systematics". Journal of Vertebrate Paleontology 29 (2): 437-452.
  2. ^ Grigoriev, D. V. (2013). "Redescription of Prognathodon lutugini (Squamata, Mosasauridae)." Proceedings of the Zoological Institute RAS, 317(3): 246-261.
  3. ^ Tod W. Reeder, Ted M. Townsend, Daniel G. Mulcahy, Brice P. Noonan, Perry L. Wood Jr., Jack W. Sites Jr., and John J. Wiens. (2015). "Integrated analyses resolve conflicts over Squamate reptile phylogeny and reveal unexpected placements for fossil taxa" PloS one 10(3): e0118199.