Caedibacteriaceae corrig. Preer et al. 1974 Caedibacteriaceae corrig. Preer et al. 1974 Caedobacteriaceae (sic) Preer et al. 1974 Caedobacter (sic) (ex Preer et al. 1974) Preer and Preer 1982 emend. Schrallhammer et al. 2018 Caedibacter corrig. (ex Preer et al. 1974) Preer and Preer 1982 emend. Schrallhammer et al. 2018 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 Caedibacteriaceae corrig. Preer et al. 1974 Caedobacteriaceae (sic) Preer et al. 1974 Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980) emend. Dumler et al. 2001 Anaplasmataceae Philip 1957 (Approved Lists 1980) emend. Dumler et al. 2001 Holosporaceae Görtz and Schmidt 2006 emend. Szokoli et al. 2016 Rickettsiaceae Pinkerton 1936 (Approved Lists 1980) emend. Dumler et al. 2001 Incertae sedis 43 None 2015 Ehrlichiaceae Moshkovski 1945 (Approved Lists 1980) emend. Hördt et al. 2020 Hepatincolaceae Szokoli et al. 2016 Incertae sedis 4 Garrity et al. 2007 Incertae sedis 240 Baker et al. 2003 Incertae sedis 226 Vannini et al. 2010 Incertae sedis 227 Vannini et al. 2010 Incertae sedis 256 Boscaro et al. 2013 Incertae sedis 303 Matsuura et al. 2012 Midichloriaceae Montagna et al. 2013 Paracaedibacteraceae Hess et al. 2016 Incertae sedis 441 Matsuura et al. 2012 Incertae sedis 517 Schulz et al. 2014 Tenuibacteraceae Kroer et al. 2016 Deianiraeaceae Castelli et al. 2019 Neowolbachieae Li et al. 2019 Caedobacter (sic) (ex Preer et al. 1974) Preer and Preer 1982 emend. Schrallhammer et al. 2018 Caedibacter corrig. (ex Preer et al. 1974) Preer and Preer 1982 emend. Schrallhammer et al. 2018 Preer J.R. Preer L.B. Jurand A. Kappa and other endosymbionts in Paramecium aurelia 1974 38 2 113 163 Bacteriological Reviews Bacteriol Rev 0005-3678 1098-5557 4599970 Incertae sedis 4 Garrity et al. 2007 Preer J.R. Preer L.B. Revival of names of protozoan endosymbionts and proposal of Holospora caryophila nom. nov. 1982 32 1 140 141 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-32-1-140 Preer J.R. Preer L.B. Jurand A. Kappa and other endosymbionts in Paramecium aurelia 1974 38 2 113 163 Bacteriological Reviews Bacteriol Rev 0005-3678 1098-5557 4599970 Garrity G.M. Lilburn T.G. Cole J.R. Harrison S.H. Euzeby J. Tindall B.J. Part 3 – The Bacteria: Phylum Proteobacteria, Class Alphaproteobacteria 2007 52 111 The Taxonomic Outline of Bacteria and Archaea Release 7.7 Michigan State University Board of Trustees