Two-empire system
From Wikipedia, the free encyclopedia
The two-empire system is the top-level biologicial classification system in general use before the establishment of the three-domain system. Some biologists prefer the two-empire system over the three-domain system, in that the three-domain system overemphasizes the division between Archaea and Bacteria. Detractors of the two-domain system point to evidence that suggest that the Archaea are more closely related to the Eukarya than the Bacteria.
| Two empires | Three domains | Six kingdoms | ||
|---|---|---|---|---|
| Mineralia non-life | ||||
| Biota / Vitae life | ||||
| Acytota / Aphanobionta (Viruses, Viroids, Prions?, ...) non-cellular life | ||||
| Cytota cellular life | ||||
| Prokaryota / Procarya (Monera) | Bacteria | Eubacteria | ||
| Archaea | Archaebacteria | |||
| Eukaryota / Eucarya | Eukaryota | Protista | ||
| Fungi | ||||
| Plantae | ||||
| Animalia | ||||
- Three Kingdom System: — Animalia – Vegetabilia – Mineralia
- Two Kingdom System — Flora – Fauna
