Before, in the Jura Awal ocean about 175 million years ago, there was a species known as Franconiasaurus brevispinus. This prehistoric reptile belongs to the Plesiosauroidea category, which is part of the plesiosaurus family, and has been known since the Jurassic and Cretaceous periods. Information regarding the discovery of this plesiosaurus species was taken from a source published in sci.news on (21/03).

They also explained that the transition event from Early to Middle Jurassic, which occurred approximately 175 to 171 million years ago, became the center of attention because it was believed to have a significant impact on three main lineages of Plesiosaurus: Rhomaleosauridae, Pliosauridae, and Plesiosauroidea. Paleontologists highlighted the discovery of two fossil skeletons of Franconiasaurus brevispinus in a clay pit that is now abandoned, which is part of the Jurensismergel Formation in Mistelgau, Bavaria, Germany.