Name: Kourisodon (razor tooth).
Phonetic: Kor-e-so-don.
Named By: E.‭ ‬L.‭ ‬Nicholls‭ & ‬D.‭ ‬Meckert‭ ‬-‭ ‬2002.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Squamata,‭ ‬Mosasauridae.
Species: K.‭ ‬puntledgensis‭ (‬type‭)‬.
Diet: Carnivore/Piscivore.
Size: Roughy about 3.7 to 3.8 meters long..
Known locations: Canada,‭ ‬British Columbia‭ ‬-‭ ‬Pender Formation.‭ ‬Japan,‭ ‬Kagawa Prefecture‭ ‬-‭ ‬Hiketa Formation,‭ ‬Osaka‭ ‬-‭ ‬Mutsuo Formation.
Time period: Santonian to Maastrichtian of the Cretaceous.
Fossil representation: Partial remains of several individuals.

       Kourisodon was first described from fossil remains discovered in British Columbia,‭ ‬though since this time more partial remains from Japan have been attributed to the genus.‭ ‬Not only does this significantly expand upon the known geographical range of Kourisodon,‭ ‬but it indicates that Kourisodon existed from the Santonian of the Canadian deposits,‭ ‬all the way to the Campanian and Maastrichtian of the Japanese deposits.
       Kourisodon is noted as being similar to the genus Clidastes,‭ ‬and like this mosasaur,‭ ‬Kourisodon was likely a fast and agile swimmer that enabled it to chase down fast moving prey such as fish.

Further reading
-‭ [‬Crocodilian-like teeth‭ (? ‬Mosasauridae‭) ‬from the Izumi Group‭ (‬Upper Cretaceous,‭ ‬Maastrichtian‭) ‬of Sobura,‭ ‬Kaizuka-city,‭ ‬Osaka Prefecture,‭ ‬southwest Japan‭]‬.‭ ‬Chigakukenkyu‭ ‬47‭(‬2‭)‬:91-95.‭ ‬-‭ ‬M.‭ ‬Tanimoto,‭ ‬M.‭ ‬Tani‭ & ‬M.‭ ‬Minamino‭ ‬-‭ ‬1998.
-‭ ‬Marine reptiles from the Nanaimo Group‭ (‬Upper Cretaceous‭) ‬of Vancouver Island.‭ ‬-‭ ‬Canadian Journal of Earth Sciences‭ ‬39‭(‬11‭)‬:1591-1603.‭ ‬-‭ ‬E.‭ ‬L.‭ ‬Nicholls‭ & ‬D.‭ ‬Meckert‭ ‬-‭ ‬2002.
-‭ ‬Mosasaur remains from the Upper Cretaceous Izumi Group of southwest Japan.‭ ‬-‭ ‬Netherlands Journal of Geosciences‭ ‬-‭ ‬Geologie en Mijnbouw‭ ‬84‭(‬3‭)‬:373-378.‭ ‬-‭ ‬M.‭ ‬Tanimoto‭ ‬-‭ ‬2005.


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