PliosaurusPliosaurus (meaning 'more lizard') is an extinct genus of thalassophonean pliosaurid known from the Kimmeridgian and Tithonian stages (Late Jurassic) of Europe and South America. Their diet would have included fish, cephalopods, and marine reptiles. This genus has contained many species in the past but recent reviews found only six (P. brachydeirus (type species), P. carpenteri, P. funkei, P. kevani, P. rossicus and P. westburyensis) to be valid, while the validity of two additional species awaits a petition to the International Code of Zoological Nomenclature.
PeloneustesPeloneustes (meaning ) is a genus of pliosaurid plesiosaur from the Middle Jurassic of England. Its remains are known from the Peterborough Member of the Oxford Clay Formation, which is Callovian in age. It was originally described as a species of Plesiosaurus by palaeontologist Harry Govier Seeley in 1869, before being given its own genus by naturalist Richard Lydekker in 1889. While many species have been assigned to Peloneustes, P.
LiopleurodonLiopleurodon (ˌlaɪoʊ-ˈplʊərədɒn; meaning 'smooth-sided teeth') is an extinct genus of large, carnivorous marine reptile belonging to the Thalassophonea, a clade of short-necked pliosaurid plesiosaurs. Liopleurodon lived from the Callovian Stage of the Middle Jurassic to the Kimmeridgian stage of the Late Jurassic Period (c. 166 to 155 mya). It was the apex predator of the Middle to Late Jurassic seas that covered Europe. The largest species, L. ferox, is estimated to have grown up to in length based on the largest known skull.
KronosaurusKronosaurus (ˌkrɒnoʊˈsɔːrəs ; meaning "lizard of Kronos") is an extinct and potentially dubious genus of short-necked pliosaurs that lived during the Early Cretaceous period (Aptian to Late Albian) in what is now Australia. One species is known, K. queenslandicus, described in 1924 from a partial fossil discovered in Queensland (hence its name). The rare other fossils traditionally attributed to the genus indicate that the animal should have reached a size approaching in length.
PlesiosaurThe Plesiosauria (ˌpliːsiəˈsɔːriə,_-zi-; Greek: πλησίος, plesios, meaning "near to" and sauros, meaning "lizard") or Plesiosaurs are an order or clade of extinct Mesozoic marine reptiles, belonging to the Sauropterygia. Plesiosaurs first appeared in the latest Triassic Period, possibly in the Rhaetian stage, about 203 million years ago. They became especially common during the Jurassic Period, thriving until their disappearance due to the Cretaceous–Paleogene extinction event at the end of the Cretaceous Period, about 66 million years ago.