Shonisaurus

Extinct genus of reptiles

Shonisaurus is a genus of very large ichthyosaurs. At least 37 incomplete fossil specimens of the type species, Shonisaurus popularis, have been found in the Luning Formation of Nevada, United States. This formation dates to the late Carnian-early Norian age of the Late Triassic, around 227 million years ago.

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