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 Class Scotobacteria Gibbons and Murray 1978 (Approved Lists 1980) Order Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980)