Platypterygiidae is a family of extinct marine reptiles that lived during the Late Jurassic to Early Cretaceous periods. These creatures are part of the larger group known as ichthyosaurs, which were known for their fish-like body shape and adaptations for life in the ocean. Platypterygiids had elongated bodies, large flippers, and a streamlined appearance, making them efficient swimmers. Fossils of Platypterygiidae have been found in various locations around the world, indicating they were widespread in ancient seas. They are characterized by their unique skull structure and dental features, which suggest they had a diverse diet, likely including fish and other marine organisms.