1903 in paleontology Newly named dinosaurs Newly named dinosaurs

| Name_ | Novelty | Status_ | Authors | Unit | Location_ |
|---|---|---|---|---|---|
| Brachiosaurus | gen et sp | Valid | Riggs | Morrison Formation , Colorado | USA |
| Haplocanthosaurus | gen et sp | Valid; nomen conservandum | Hatcher | Morrison Formation , Colorado | USA |
|  Haplocanthus  | gen et sp | Nomen oblitum | Hatcher | Morrison Formation , Colorado | USA |
| Ornitholestes | gen et sp | Valid | Osborn | Morrison Formation , Wyoming | USA |
| Telmatosaurus | gen | Valid | Nopcsa | Sânpetru Formation , Transylvania | Romania |