Kingdom Bacteria Cavalier-Smith 2002 - bacteria see Domain Bacteria Woese et al. 1990 Subkingdom Unibacteria Cavalier-Smith 2002 see Domain Bacteria Woese et al. 1990 Division Archaebacteria Cavalier-Smith 2002 see Domain Archaea Woese et al. 1990 Subdivision Euryarchaeota Cavalier-Smith 2002 see Phylum Euryarchaeota Garrity and Holt 2001 Superclass Eurythermea Cavalier-Smith 2002 Class Protoarchaea Cavalier-Smith 2002 see Class Thermococci Zillig and Reysenbach 2002