Leptocleidus

Hastanectes

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Hastanectes valdensis, whose name means “the Hastings swimmer from the Weald”, was a prehistoric marine reptile which swam the seas around Europe during the early Cretaceous Period approximately 140 to 135 million years ago. The first fossils of this creature… Read More ›

Leptocleidus

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NOTE: This post was originally published on May 13, 2022. It was updated and re-uploaded on April 14, 2026. Leptocleidus was a genus of plesiosaur which lived in the oceans during the early Cretaceous Period about 135 to 125 million years… Read More ›