I think it would be cool if they added more Ichthyosaur species into the game, because so far they have added a bunch of species for the pliosaurs and plesiosaurs in this game. Some species that I think would make nice additions to the game are:
Temnodontosaurus
Leptonectes
Cymbospondyus
Grippia
Utatsusaurus
Ophthalmosaurus
Besanosaurus
Chaohusaurus
Thaisaurus
Undorosaurus
Qianichthyosaurus
Guizhouichthyosaurus
Some non-Ichthyosaur marine species that could also make nice additions to the game are:
Yunguisaurus
Macroplata
Cryptoclidus
Pliosaurus funkei, or, as it is more commonly called, Predator X
Plotosaurus
Angolasaurus
Komensaurus
Add it to my mega list, and expect it to be reposted regularly.
Theropods
Afrovenator, Austroraptor (feathered fish eater), Chilantaisaurus, Concavenator (unique design), Deinocheirus (feathred fish & plant eater), Deltadromeus, Eustreptospondylus, uiraptor, Gasosaurus, Gojirasaurus, Ichthyovenator, Irritator, Liliensternus, Masiakasaurus, Mononykus (unique design), Neovenator, Ornitholestes, Pelecanimimus (𝘶𝘯𝘧𝘦𝘢𝘵𝘩𝘦𝘳𝘦𝘥 fish & plant eater to make Deinocheirus more special), Piatnitzkysaurus, Rajasaurus, Rugops, Siats, Tarbosaurus, Torvosaurus, Yangchuanosaurus, Yutyrannus (feathered)
Sauropodomorphs
Agustinia, Ampelosaurus, Bajadasaurus, Barosaurus, Cetiosaurus, Diamantinasaurus, Eoraptor (meat & plant eater), Glacialisaurus, Isisaurus, Jobaria, Lessemsaurus, Lufengosaurus, Omeisaurus, Plateosaurus, Massospondylus, Mussasaurus, Nemegtosaurus, Saltasaurus, Shunosaurus, Yunnanosaurus
Since Glacialisaurus had to fend off Cryolophosaurus, implement fighting for long necks.
Thyreophorans
Antarctopelta, Dacentrurus, Edmontonia, Gargoyleosaurus, Gastonia, Hylaeosaurus, Jakapil, Miragaia, Pinacosaurus, Saichania, Scelidosaurus, Stegouros, Struthiosaurus, Tuojiangosaurus, Ziapelta, Zuul
Marginocephalians
Agujaceratops, Alaskacephale, Centrosaurus, Diabloceratops, Einiosaurus, Kosmoceratops, Microceratus, Prenocephale, Protoceratops (fighter), Psittacosaurus, Stegoceras, Udanoceratops, Wannanosaurus
Ornithopods+
Altirhinus, Brachylophosaurus, Camptosaurus, uisaurus, Gryposaurus, Hadrosaurus, Heterodontosaurus, Hypsilophodon, Lambeosaurus, Lesothosaurus, Leaellynasaura, Nanosaurus, Saurolophus, Tenotosaurus, Thescleosaurus, Zalmoxes
Pterosaurs
Aerotitan, Alanqa, Anhanguera, Anurognathus, Arambourgiania, Azhdarcho, Caulkicephalus, Caupedactylus, Coloborhynchus, Cryodrakon, Darwinopterus, Dorygnathus, Eosipterus, Eudimorphodon, Europejara, Feilongus, Ferrodraco, Gladocephaloideus, Guidraco, Hatzegopteryx, Istiodactylus, Lacusovagus, Jeholopterus, Ludodactylus, Nesodactylus, Nyctosaurus, Peteinosaurus, Pterodactylus, Pterodaustro, Rhamphorhynchus, Scaphognathus, Sordes, Tethydraco, Thalassodromeus, Tupandactylus, Tupuxuara, Xericeps, Zhenyuanopterus, Zhejiangopterus
Marine Reptiles
Archelon, Aristonectes, Atopodentatus, Augustasaurus, Californosaurus, Cryptoclidus, Cymbospondylus, Dakosaurus, Dolichorhynchops, Eurhinosaurus, Futabasaurus, Hauffiosaurus, Henodus, Kaikaifilu, Kimmerosaurus, Leptocleidus, Leptonectes, Macroplata, Metriorhynchus, Mixosaurus, Muraenosaurus, Nothosaurus, Ophthalmosaurus, Placodus, Platecarpus, Plesiosuchus, Pliosaurus, Plotosaurus, Prognathodon, Protostega, Rhomaleosaurus, Shastasaurus, Shonisaurus, Simolestes, Suchodus, Tanystropheus, Temnodontosaurus, Tuarangisaurus, Tyrannoneustes, Woolungasaurus, Yunguisaurus
To increase diversity, here are some much needed taxonomic families of marine reptiles. https://en.m.wikipedia.org/wiki/Aristonectinae https://en.m.wikipedia.org/wiki/Cryptoclididae https://en.m.wikipedia.org/wiki/Elasmosauridae https://en.m.wikipedia.org/wiki/Geosaurinae...
forums.frontier.co.uk
Non-Cynodont Synapsids
Anteosaurus, Cotylorhynchus, Edaphosaurus, Estemmenosuchus, Inostrancevia, Moschops, Ophiacodon, Placerias (fighter), Pristerognathus, Tetraceratops, Tiarajudens
Variants Needing Colors & Patterns
Allosaurus 2022, Ankylosaurus 2001, Brachiosaurus 1993 & 2001, Dimorphodon 2022, Parasaurolophus 2022, Pteranodon 2001, Stegosaurus 1997, Triceratops 1993, Tyrannosaurus 65M, Velociraptor 2001 Male & Female