Kingdom Procaryotae Murray 1968 (Approved Lists 1980) see Domain Bacteria Woese et al. 1990
   Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980) see Phylum Gracilicutes
     1 Class Scotobacteria Gibbons and Murray 1978 (Approved Lists 1980)
     2 Class Anoxyphotobacteria (Gibbons and Murray 1978) Murray 1988
     3 Class Oxyphotobacteria (ex Gibbons and Murray 1978) Murray 1988