Scientists reexamine 47-year-old fossil and discover a new Jurassic sea monster

A new long-necked marine reptile, Plesionectes longicollum, has been identified from a decades-old fossil found in Germany’s Posidonia Shale. The remarkably preserved specimen rewrites part of the Jurassic marine story, revealing unexpected diversity during a time of oceanic chaos. It is now the oldest known plesiosaur from Holzmaden.