Also called “Satsuma-Utsunomiyaryu,” the fossilized plesiosaur was found in a 100-million-year-old stratum from the Cretaceous Period by Utsunomiya, a Panasonic Corp. employee, in 2004.

A small team of archaeologists, geologists, paleontologists and climate scientists has found that at least one type of plesiosaur had scales on its flippers similar to modern sea turtle species.

Scaly or smooth? That has long been one of paleontology’s enduring questions about the plesiosaur. While experts know details about its diet, size, and general habitat, the aquatic reptile’s ...

The mix of features offers new clues to how plesiosaurs navigated prehistoric oceans. The tip of a right flipper of the new plesiosaur fossil, with two scales along the trailing edge. A new study ...

Researchers at Lund University in Sweden have examined fossilized soft tissue from a plesiosaur for the first time, revealing that the ancient marine reptile had both smooth and scaly skin. The study, ...

It was found near the site where a plesiosaur fossil was unearthed in 2004, the board of education announced on Aug. 26. A research team said the two fossilized species are some of the oldest in ...

Plesiosaurs lived in the world's oceans for much of the Mesozoic Era (203-66 million years ago). These reptiles, which could grow up to 12 meters long, fed on fish and moved much like sea turtles ...