Dinopedia
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Utatsusaurus was the earliest ichthyosaur. It existed in the Early Triassic from 248-245 MYA. It measured up to 9 ft (almost 3 meters).

It was named after the city Utatsu-cho where the first specimen was found. However, fossils were also found in Canada. Unlike other ichthyosars, it had no dorsal fin. It also had a broad skull and tapers compared to the rounded to the other ichthyosaurs.

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