Name: Goronyosaurus ‭(‬Goronyo lizard‭)‬.
Phonetic: Go-ron-e-o-sore-us.
Named By: A.‭ ‬Azzaroli,‭ ‬C.‭ ‬De Giuli,‭ ‬G.‭ ‬Ficcarelli‭ & ‬D.‭ ‬Torre‭ ‬-‭ ‬1972.
Synonyms: Mosasaurus nigeriensis.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Squamata,‭ ‬Mosasauridae.
Species: G.‭ ‬nigeriensis‭ (‬type‭)‬.
Diet: Carnivore.
Size: Holotype estimated to be about 5.1 and 5.2 meters long.
Known locations: Niger.‭ ‬Nigeria‭ ‬-‭ ‬Dukamaje Formation‭ (‬Gypsiferous shale Member‭)‬,‭ ‬Rima Formation‭ (‬Dukamaje Member‭ )‬.
Time period: Maastrichtian of the Cretaceous.
Fossil representation: ‭Partial skull and post cranial remains.

       Originally named as a species of Mosasaurus,‭ ‬Goronyosaurus was a medium sized mosasaur that lived in the waters of Africa.‭ ‬So far fossils of Goronyosaurus have been found in Niger and Nigeria.‭ ‬The key thing here is that Niger is a land locked country,‭ ‬so this may actually be an indicator that Goronyosaurus swam up rivers as it hunted for prey.‭ ‬This is not that much of a stretch of the imagination,‭ ‬the genus Pannoniasaurus that was named in‭ ‬2012‭ ‬is the first genus of mosasaur that has been confirmed as coming from a freshwater deposit.‭ ‬Therefore it is not wholly improbable that Goronyosaurus and maybe other mosasaurs hunted in freshwater at least occasionally.‭

Further reading
-‭ ‬An aberrant mosasaur from the Upper Cretaceous of north-western Nigeria.‭ ‬-‭ ‬Rendiconti della classe di fisiche,‭ ‬mathematiche e naturali‭ ‬52:398-402.‭ ‬-‭ ‬A.‭ ‬Azzaroli,‭ ‬C.‭ ‬De Giuli,‭ ‬G.‭ ‬Ficcarelli‭ & ‬D.‭ ‬Torre‭ ‬-‭ ‬1972.
- The mosasaur Goronyosaurus from the Upper Cretaceous of Sokoto State, Nigeria. - Palaeontology. 31 (3): 747–762. - T. Soliar - 1988.


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