These are species which reproduce themselves exclusively via artificial cloning. Parthenogenesis, although technically a form of cloning, is a natural process and therefore isn't included here (it would go under Asexual Species instead).
“The Volge are a species of world-conquering aliens, sometimes considered as one of the Votan...Volge
“The Horatio are one of the playable factions in Endless Space. A race of clones, their leader...Horatio