| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images |
|---|---|---|---|---|---|---|---|---|
| Bibio lartetii[1] | Sp. nov | jr synonym | Oustalet, 1870 | Oligocene | A bibionid, moved to Plecia larteti in 2017 | |||
| Protomyia lugens | Sp nov | jr synonym | Oustalet, 1870 | Oligocene | A bibionid, moved to Penthetria lugens in 2017 | |||
| Name | Novelty | Status | Authors | Age | Unit | Location | Notes | Images | |
|---|---|---|---|---|---|---|---|---|---|
| Asineops[2] | Gen et Sp nov | valid | Cope | Eocene Ypresian | Green River Formation | A fish of possibly Percopsiformes affiliation. The type species is A. squamifrons | |||
| Cyprinodon levatus[3] | Sp nov | Jr synonym | Cope | Eocene Ypresian | Green River Formation | A percopsid fish Moved to Erismatopterus levatus in 1871 | thumb|center|upright|Erismatopterus levatus | ||
| Name | Status | Authors | Location | Notes | Images | ||
|---|---|---|---|---|---|---|---|
| Antrodemus | Nomen dubium | Joseph Leidy | Possible subjective synonym of Allosaurus. | ||||
| Ornithopsis | Nomen dubium | Harry Govier Seeley | Earlier it was believed that the fossils were those of a pterosaur. But now it is known that they were the bones of a Sauropod. | ||||
| Struthiosaurus | Valid | Bunzel | A dwarf ankylosaur. | ||||
| Name | Status | Authors | Location | Notes | |
|---|---|---|---|---|---|
| Taphrosaurus | Valid | Cope | |||
| Uronautes | Valid | Cope | |||
| Name | Status | Authors | Location | Notes | Images | |
|---|---|---|---|---|---|---|
| Amblydectes | Jr. synonym. | Seeley | Junior synonym of Coloborhynchus. | |||
| Cycnorhamphus | Valid | Seeley | ||||
| Rhabdopelix | Misidentification | Cope | At first it was thought to be a Triassic pterosaur, but is now known to be (at least in part) a kuehneosaurid | |||