👉 Crossosomataceous is a genus of extinct marine mammals that lived during the Mesozoic era, around 60 to 59 million years ago. They were a type of pterosaur and had wings, but unlike other pterosaurs of this period, their wings were not adapted for flight but instead provided support for their body weight. The exact age of Crossosomataceous is unknown due to the lack of fossil records from that time period. However, some
