Pliosauridae is a family of pliosauroid plesiosaurs from the Earliest Jurassic to the early Late Cretaceous (Hettangian to Turonian stages) of Australia, Europe, North America and South America. Past the Turonian, these animals may have been replaced by the mosasaurs. It was formally named by Harry G. Seeley in 1874. == Phylogeny == Pliosauridae i...