List of extinct marine reptiles

From the Permian to the present day there has been numerous groups of extinct reptiles that have adapted to life in the marine realm:

Mesosaurs

 * Mesosauridae: Early Permian
 * Stereosternum
 * Mesosaurus

Lizards

 * Aigialosauridae: Late Cretaceous


 * Dolichosauridae: Late Cretaceous
 * Adriosaurus
 * Dolichosaurus
 * Judeasaurus


 * Kaganaias: Late Cretaceous


 * Mosasaurs: Late Cretaceous
 * Mosasaurinae
 * Carinodens
 * Clidastes
 * Dallasaurus
 * Globidens
 * Mosasaurus
 * Plotosaurus
 * Prognathodon
 * Halisaurinae
 * Eonatator
 * Halisaurus
 * Tylosaurinae
 * Hainosaurus
 * Tylosaurus
 * Taniwhasaurus
 * Plioplatecarpinae
 * Platecarpus
 * Plioplatecarpus
 * Selmasaurus

Prolacertiformes

 * Dinocephalosaurus: Middle Triassic

Sauropterygians

 * Placodonts: Triassic
 * Cyamodus
 * Henodus
 * Paraplacodus
 * Placochelys
 * Placodus
 * Psephoderma


 * Nothosaurs: Triassic
 * Lariosaurus
 * Nothosaurus


 * Pachypleurosaurs: Triassic
 * Anarosaurus
 * Dactylosaurus
 * Keichousaurus
 * Neuticosaurus


 * Pistosaurus:Middle Triassic


 * Plesiosaurs: Early Jurassic - Late Cretaceous
 * Plesiosaurus
 * Cimoliasauridae
 * Cryptoclididae
 * Cryptoclidus
 * Microcleidus
 * Muraenosaurus
 * Elasmosauridae
 * Elasmosaurus
 * Futabasaurus
 * Hydrotherosaurus
 * Libonectes
 * Mauisaurus
 * Thalassomedon
 * Polycotylidae
 * Dolichorhynchops
 * Edgarosaurus
 * Manemergus
 * Sulcusuchus
 * Thililua
 * Trinacromerum


 * Pliosaurs: Early Jurassic - Late Cretaceous
 * Kronosaurus
 * Liopleurodon
 * Macroplata
 * Peloneustes
 * Rhomaleosaurus
 * Umoonasaurus

Crocodilians

 * Thalattosuchia: Early Jurassic - Early Cretaceous
 * Metriorhynchidae
 * Aggiosaurus
 * Dakosaurus
 * Enaliosuchus
 * Geosaurus
 * Metriorhynchus
 * Neustosaurus
 * Purranisaurus
 * Teleidosaurus
 * Teleosauridae
 * Machimosaurus
 * Pelagosaurus
 * Platysuchus
 * Teleosaurus
 * Steneosaurus

Sea turtles

 * Allopleuron
 * Archelon
 * Pneumatoarthrus
 * Protostega