| A (13 species) |
| Abyssosaurus - Early Cretaceous, 133-130 Ma |
| Albertonectes - Late Cretaceous, 73.5 Ma |
| Alexeyisaurus - Late Triassic, 210 Ma |
| Anguanax - Late Jurassic, 160 Ma |
| Anningasaura - Early Jurassic, 201.3-199.6 Ma |
| Apatomerus - Early Cretaceous |
| Aphrosaurus - Late Cretaceous, 70-66 Ma |
| Aptychodon - Cretaceous |
| Archaeonectrus - Jurassic |
| Aristonectes - Late Cretaceous |
| Attenborosaurus - Early Jurassic |
| Atychodracon - Late Triassic-Early Jurassic, 201 Ma |
| Avalonnectes - Early Jurassic, 199.6-198 Ma |
| B (3 species) |
| Borealonectes - Middle Jurassic |
| Brachauchenius - Late Cretaceous, 93-89.3 Ma |
| Brancasaurus - Berriasian |
| C (4 species) |
| Callawayasaurus - Early Cretaceous, Aptian |
| Charitosaurus - Unavailable |
| Colymbosaurus - Callovian to late Tithonian |
| Cryptoclidus - Middle Jurassic, 166-164 Ma |
| D (4 species) |
| Discosaurus - Late Cretaceous, 80.5 Ma |
| Djupedalia - Late Jurassic |
| Dolichorhynchops - Late Cretaceous, 93.5-70.6 Ma |
| Dravidosaurus - Late Cretaceous |
| E (5 species) |
| Edgarosaurus - Early Cretaceous |
| Elasmosaurus - Late Cretaceous, 80.5 Ma |
| Eoplesiosaurus - Early Jurassic, 199.6-198 Ma |
| Eopolycotylus - Unavailable |
| Eromangasaurus - Early Cretaceous, 103 Ma |
| F (1 species) |
| Fresnosaurus - Late Cretaceous, 70-66 Ma |
| G (1 species) |
| Gallardosaurus - Oxfordian |
| H (2 species) |
| Hexatarsostinus - Rhaetian - Hettangian |
| Hydrotherosaurus - Late Cretaceous, 70-66 Ma |
| I (0 species) |
| J (0 species) |
| K (2 species) |
| Kimmerosaurus - 150.8-145.5 Ma Late Jurassic, Tithonian |
| Kronosaurus - Early Cretaceous, 125-99 Ma |
| L (3 species) |
| Liopleurodon - Middle-Late Jurassic, 160-155 Ma |
| Luetkesaurus - Late Cretaceous |
| Lusonectes - Early Jurassic, Toarcian |
| M (5 species) |
| Maresaurus - Middle Jurassic |
| Mauisaurus - Late Cretaceous, 77 Ma |
| Meyerasaurus - Early Jurassic, 183-180 Ma |
| Morenosaurus - Late Cretaceous, 70-66 Ma |
| Muraenosaurus - Middle Jurassic, Callovian |
| N (0 species) |
| O (0 species) |
| P (8 species) |
| Palmulasaurus - Late Cretaceous |
| Pantosaurus - Late Jurassic, Oxfordian |
| Peloneustes - Middle Jurassic |
| Plesiopleurodon - Late Cretaceous, 98 Ma |
| Plesiosaurus - Early Jurassic, 199.6-175.6 Ma |
| Pliosaurus - Late Jurassic, 155.7-147 Ma |
| Polycotylus - Late Cretaceous |
| Polyptychodon - Late Cretaceous, 101-89.3 Ma |
| Q (0 species) |
| R (1 species) |
| Rhomaleosaurus - Early Jurassic, Toarcian |
| S (5 species) |
| Simolestes - 170-145 Ma Middle-Late Jurassic |
| Sinopliosaurus - Early Cretaceous |
| Spitrasaurus - Late Jurassic |
| Stratesaurus - Early Jurassic, 199.6-198 Ma |
| Styxosaurus - Late Cretaceous, 83.5-80.5 Ma |
| T (8 species) |
| Tatenectes - Late Jurassic, Oxfordian |
| Terminonatator - Late Cretaceous, Campanian |
| Thalassiodracon - Rhaetian - Hettangian |
| Thalassomedon - Late Cretaceous, 95 Ma |
| Thililua - Late Cretaceous, Turonian |
| Tricleidus - Middle Jurassic, Callovian |
| Trinacromerum - Late Cretaceous |
| Tuarangisaurus - Late Cretaceous, 78 Ma |
| U (0 species) |
| V (3 species) |
| Vectocleidus - Early Cretaceous, 127-125 Ma |
| Vegasaurus - Late Cretaceous, 72 Ma |
| Vinialesaurus - Late Jurassic, Oxfordian |
| W (2 species) |
| Westphaliasaurus - Early Jurassic, Pliensbachian |
| Woolungasaurus - Early Cretaceous |
| X (0 species) |
| Y (1 species) |
| Yuzhoupliosaurus - Middle Jurassic |
| Z (0 species) |