Hypothetical species
Several species have been assumed to exist, but due to a lack of physical evidence they can only be regarded as potential species. Hypothetical species are usually believed to be extinct. They have caused confusion, as they may have been a separate species, a subspecies, an introduced species or a misidentification.
List of hypothetical species
Birds
- Bird of Washington
- Dominican green-and-yellow macaw
- Gallus giganteus
- Guadeloupe amazon
- Guadeloupe parakeet
- Jamaican red macaw
- Lesser Antillean macaw
- Madeira finch
- Martinique amazon
- Martinique macaw
- Painted vulture
- Red-headed macaw
- Réunion solitaire or white dodo (misidentification of the Réunion ibis)
- Réunion swamphen
- Hypothetical relatives of the Rodrigues parrot
Dinosaurs
Insects
Mammals
- Andean wolf
- Bili Ape
- Chilihueque
- Kallana
- Kting voar
- Long-necked seal
- Marozi
- Sonnerat's shrew
- Steller's sea ape
- Sumxu
- Unidentified extinct canid populations
Fish
- Bathyceratias
- Bathyembryx
- Bathysidus
- Bathysphaera