Dinosaurs New taxa Taxon Novelty Status Author(s) Age Unit Location Notes Images BrachiosaurusRiggs, E.S. 1903. Brachiosaurus altithorax, the largest known dinosaurs. Amer. J. Science 15 (4):pp. 299-306. Gen. et sp. nov. Valid Riggs Late Jurassic Morrison Formation A brachiosaurid Claosaurus affinis Sp. nov. Nomen dubium Wieland Maastrichtian Pierre Shale A species of Claosaurus HaplocanthosaurusHatcher, J.B. 1903. A new name for the Dinosaur Haplocanthus Hatcher. Proceedings of the Biological Society of Washington 16: p.100. Gen. nov. Nomen conservandum Hatcher Late Jurassic Morrison Formation New name for "Haplocanthus", mistakenly thought preoccupied Haplocanthosaurus utterbackiHatcher, J.B. 1903. Osteology of Haptocanthosaurus. with description of a new species, and remarks on the probable habits of the Sauropoda and the age and origin of the Atlantosaurus beds. Mem. Carnegie Mus. 2: pp. 1-72. Sp. nov. Jr. synonym Hatcher Late Jurassic Morrison Formation A species of Haplocanthosaurus now a synonym of Haplocanthosaurus priscus Haplocanthus priscus Gen. et sp. nov. Nomen rejectum Hatcher Late Jurassic Morrison Formation Erroneously thought preoccupied by Haplacanthus Agassiz, 1845 and renamed Haplocanthosaurus. OrnitholestesOsborn, H. F. 1903. Ornitholestes hermanni, a new compsognathoid dinosaur from the Upper Jurassic. Bull. Amer. Mus. Nat. Hist. 19: pp. 459-464. Gen. et sp. nov. Valid Osborn Kimmeridgian Morrison Formation Known from a single skull and partial skeleton. TelmatosaurusNopcsa, F. 1903. Telmatosaurus, new name for the dinosaur Limnosaurus. Geol. Mag. (ser. 4) 10:pp. 94-95. Gen. nov. Valid Nopcsa Maastrichtian Sânpetru Formation New genus name for Limnosaurus transsylvanicus
Sauropterygians Plesiosaur gastroliths documented.Williston (1903). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167.
Newly named plesiosaurs Name Novelty Status Authors Age Unit Location Notes Images Apatomerusgen et spValid WillistonAlbian Kiowa Shale, Kansasfirst described as a pterosaur; reidentified in the 1970s Brachaucheniusgen et spValid WillistonTuronianGreenhorn Formation,
(, , and )A brachauchenine pliosaurid. Dolichorhynchopsgen et sp Valid Williston TuronianSmoky Hill Chalk, Kansas (, and ) (, , , and )A polycotylid.
Synapsids Non-mammalian
Name Novelty Status Authors Age Unit Location Notes ImagesLycosuchusgen et spValidBroomMiddle PermianMiddle Abrahamskraal Formation Scylacosaurusgen et spValidBroomLate PermianCistecephalus Assemblage Zone Scymnosaurusgen et spValidBroomMiddle PermianMiddle Abrahamskraal Formation
Eutherians Cetaceans Name Novelty Status Authors Age Unit Location Notes ImagesSqualodon bariensis latirostrisSsp. novValidCapelliniLate Oligocene (Chattian)Unnamed depositA squalodontid; now recognized as a species of Eosqualodon. Pholidotes NameAuthorsAgeLocationNotesImagesMetacheiromysWortman48 Million years ago. ( and )An Eocene Mammal related to modern pangolins.
References
Sanders F, Manley K, Carpenter K. Gastroliths from the Lower Cretaceous sauropod Cedarosaurus weiskopfae. In: Tanke D.H, Carpenter K, editors. Mesozoic vertebrate life: new research inspired by the paleontology of Philip J. Currie. Indiana University Press; Bloomington, IN: 2001. pp. 166–180. Williston, Samuel Wendel; 1903. North American Plesiosaurs; Field Columbian Museum Publication 73, Geological Series; II(I); Field Columbian Museum, Chicago.