Explore: Plesiosaurus

Plesiosaurus (Greek: πλησίος (plesios), near to + σαῦρος (sauros), lizard) is a genus of extinct, large marine sauropterygian reptile that lived during

William Daniel Conybeare established a new species of the genus Plesiosaurus, Plesiosaurus giganteus, to include all plesiosaurian specimens with shortened

the last common ancestor of Plesiosaurus dolichocheirus and Peloneustes philarchus and all its descendants. Plesiosaurus and Peloneustes represented the

another Plesiosaurus species by William Johnson Sollas in 1881, but after studies on the plaster casts made after the remains, Plesiosaurus conybeari

Kingdom. It was described by the British paleontologist Richard Owen as Plesiosaurus constrictus in 1850; Owen named the species after the extremely narrow

her reputation grew. On 10 December 1823, she found the first complete Plesiosaurus, and in 1828 the first British example of the flying reptiles known as

Lower Lias of England. The type and only species, is Thalassiodracon (Plesiosaurus) hawkinsii (Owen, 1838). Thalassiodracon hawkinsii is known from a number

giganteus. However, in 1824, William Conybeare had named a species of Plesiosaurus, Plesiosaurus giganteus, and this species was later viewed as a synonym of either

skeletal elements "Plesiosaurus" megacephalus had, relatively to other / actual species of Plesiosaurus. The pliosauroid nature of "Plesiosaurus" megacephalus

Ichthyosaurus and Plesiosaurus," ibid., 2nd ser., 1 pt. 1 (1822), 103–123; and "On the Discovery of an Almost Perfect Skeleton of the Plesiosaurus," ibid., pt