An Extinct Species is a lifeform which is no longer with us. It is though to have died out altogether, no longer possessing any live representatives of its species.
- It is contrasted with an Extant Species, which is still alive.
The term Extinct Species and its corollary Extant Species is used to describe the following lifeforms:
- Non-Sophonts or Creatures at TL-Negative
- Proto-Sophonts at TL-0
- Sophonts at TL-1 or higher (...typically capping at TL-33)
Such species have reached a state of extinction.