Dinosaurs Taxon Novelty Status Author(s) Age Unit Location Notes Images Anchisaurus major Sp. nov. Jr. synonym Marsh Hettangian Portland Formation A species of Anchisaurus now a synonym of Anchisaurus polyzelus Calamospondylus foxi Gen. et sp. nov. Preoccupied Lydekker Barremian Wessex Formation Preoccupied by Fox vide [Anonymous] 1866. Renamed Calamosaurus Ceratops horridus Sp. nov. Valid Marsh Maastrichtian Laramie Formation A species of Ceratops now named Triceratops horridus Ceratops alticornis Comb. nov. Nomen dubium Marsh Maastrichtian Laramie Formation A reassignment of Bison alticornis to Ceratops following reidentification of the age Coelophysis Gen. nov. Valid Cope Rhaetian Chinle Formation A new genus for Coelurus bauri Cryptodraco Gen. nov. Jr. synonym Lydekker Oxfordian Oxford Clay Formation Unnecessary replacement name for Cryptosaurus Hadrosaurus breviceps Sp. nov. Nomen dubium Marsh Maastrichtian Laramie Formation A species of Hadrosaurus Hadrosaurus paucidens Sp. nov. Nomen dubium Marsh Maastrichtian Laramie Formation A species of Hadrosaurus Monoclonius fissus Sp. nov. Nomen dubium Cope Campanian Judith River Formation A species of Monoclonius Monoclonius recurvicornis Sp. nov. Nomen dubium Cope Campanian Judith River Formation A species of Monoclonius Monoclonius sphenocerus Sp. nov. Nomen dubium Cope Campanian Judith River Formation A species of Monoclonius Morosaurus agilis Sp. nov. Valid Marsh Kimmeridgian Morrison Formation A species of Morosaurus, now Smitanosaurus agilis Morosaurus lentus Sp. nov. Valid Marsh Kimmeridgian Morrison Formation A species of Morosaurus, now Camarasaurus lentus Nodosaurus textilis Gen. et sp. nov. Valid Marsh Cenomanian Frontier Formation A club-less ankylosaur Orinosaurus Gen. nov. Jr. synonym Lydekker Norian Elliot Formation Unnecessary replacement name for Orosaurus Pteropelyx grallipes Gen. et sp. nov. Nomen dubium Cope Maastrichtian Laramie Formation A hadrosaurid Triceratops Gen. nov. Valid Marsh Maastrichtian Laramie Formation A new genus for Ceratops horridus Triceratops flabellatus Sp. nov. Jr. synonym Marsh Maastrichtian Laramie Formation A species of Triceratops now a synonym of Triceratops horridus Triceratops galeus Sp. nov. Jr. synonym Marsh Maastrichtian Laramie Formation A species of Triceratops now a synonym of Triceratops horridus
Plesiosaurs New taxa Name Status Authors NotesPeloneustesValidLydekker
Xiphosurans Newly named xiphosurans
References