Symbiotes lectularius (Arkwright et al. 1921) Philip 1956 (Approved Lists 1980) Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Proteobacteria (sic) Garrity et al. 2021 Pseudomonadota corrig. Garrity et al. 2021 Alphaproteobacteriota (sic) Garrity et al. 2021 Alphaproteobacteria Garrity et al. 2006 Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980) emend. Dumler et al. 2001 Incertae sedis 4 Garrity et al. 2007 Symbiotes Philip 1956 emend. Brooks 1974 (Approved Lists 1980) Symbiotes lectularius (Arkwright et al. 1921) Philip 1956 (Approved Lists 1980) Symbiotes Philip 1956 emend. Brooks 1974 (Approved Lists 1980) Symbiotes lectularius (Arkwright et al. 1921) Philip 1956 (Approved Lists 1980) Philip C.B. Comments on the classification of the order Rickettsiales 1956 2 3 261 270 Canadian Journal of Microbiology Can J Microbiol 0008-4166 1480-3275 10.1139/m56-030 13316619