1865 in paleontology
Newly named archosauromorphs
Newly named dinosaurs
| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images |
| Astrodon johnstoni | Gen. et sp. nov. | Valid | Leidy | Early Cretaceous | Arundel Formation |  Maryland |
| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images |
| Astrodon johnstoni | Gen. et sp. nov. | Valid | Leidy | Early Cretaceous | Arundel Formation | Maryland |