Here's a list of dinosaurs found in the Cretaceous period. If you know of any more, feel free to add them. Other periods to follow.
Abelisaurid
Abelisaurus
Achelousaurus
Albertosaurus
Alectrosaurus
Alioramus
Allosaurus
Altirhynus
Alxasaurus
Anhanguera
Ankylosaurus
Archelon
Archosaurus
Argentinosaurus
Azhdarchid
Bambiraptor
Baryonyx
Beipiaosaurus
Brachauchenius
Breviceratops
Byronosaurus
Calcarichelys
Callawayasaurus
Callocosaurus
Camptonotus
Camptosaurus
Carcharodontosaurus
Carnotaurus
Caudipteryx
Centorsaurus
Ceratopsomorphs
Chaoyangsaurus
Conchoraptor
Corythosaurus
Crocodilian
Deinonuchus
Deinosuchus
Dromaeosaurid
Dromaeosaurus
Dromiceiomimus
Dryosaurus
Dsungaripterus
Ectenosaurus
Edmontonia
Einiosaurus
Elasmosaurus
Erlikosaurus
Euoplocephalus
Gallimimus
Gastonia
Geosaurus
Germanodactylus
Gigantosaurus
Gnathosaurus
Hadrosaurus
Homlocephale
Hypacrosaurus
Iguanadon
Indosaurus
Indosuchus
Ingenia
Inguanadontian
Irritator
Kronosaurus
Lambeosaurus
Leptoceratops
Libonectes
Liopleurodon
Maiasaura
Majungatholus
Maniraptoran
Meiolaniid
Micropachycephalosaurus
Microraptor
Minim
Montanoceratops
Mosasaurus
Nanshiungosaurus
Neoceratopsia
Neuquensaurus
Ninjemys
Nodosaurid
Nyctosaurus
Ornithomimid
Ornithomimus
Ornithostoma
Ouranosaurus
Oviraptor
Pachycephalosaurus
Panoplosaurus
Parasaurolophus
Pelagosaurus
Pelicanimimus
Pinacosaurus
Platecarpus
Plioplatecarpus
Pliosaurus
Polacanthid
Prenocephale
Protostega
Psittacosaurus
Pteranodon
Pteranodon Ingens
Pteranodon Sternbergi
Pterodactyloid
Pterodaustro
Ptrotceratops
Saltasaurus
Sauropelta
Saurornithoides
Siamotyrannus
Sinornithosaurus
Spinosaurus
Stegoceras
Stenopelix
Struthiomimus
Stygimoloch
Styracosaurus
Suchomimus
Therizinosaurus
Theropod
Titanosaurs
Triceratops
Troodon
Tropeognathus
Tylosaurus
Tyrannosaurid
Tyrannosaurus Rex
Udanoceratops
Velociraptor
Xenotarsosaurus
Yaverlandia