Peioraidae

The Peioraidae are a family of short-necked macropredatory plesiosaurs that lived between 200 to 91 million years ago, going extinct at the minor extinction event at the end of the Qalmanian period. Descended from long-necked ancestors, they developed short necks with robust heads rather quickly, becoming the top marine predators of the middle Neomesolithic era. The most well-known peiorid species is Aequor infectorem, known from fossils found in Syltor.