Lyticum (ex Preer et al. 1974) Preer and Preer 1982 Lyticum (ex Preer et al. 1974) Preer and Preer 1982 Lyticum flagellatum (ex Preer et al. 1974) Preer and Preer 1982 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 Ehrlichiaceae Moshkovski 1945 (Approved Lists 1980) emend. Hördt et al. 2020 Lyticum (ex Preer et al. 1974) Preer and Preer 1982 Ehrlichiaceae Moshkovski 1945 (Approved Lists 1980) emend. Hördt et al. 2020 Ehrlichia Moshkovski 1945 (Approved Lists 1980) emend. Dumler et al. 2001 Neorickettsia Philip et al. 1953 (Approved Lists 1980) emend. Dumler et al. 2001 Cowdria Moshkovski 1947 emend. Philip 1974 (Approved Lists 1980) Aegyptianella Carpano 1929 (Approved Lists 1980) Wolbachia Hertig 1936 emend. Weiss 1974 (Approved Lists 1980) Lyticum flagellatum (ex Preer et al. 1974) Preer and Preer 1982 Lyticum sinuosum (ex Preer et al. 1974) Preer and Preer 1982 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 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 Hördt A. García-López M. Meier-Kolthoff J.P. Tindall B.J. Weinhold L.-M. Gronow S. Kyrpides N. Woyke T. Schleuning M. Göker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria 2020 11 468 Frontiers in Microbiology Front. Microbio. 1664-302X 10.3389/fmicb.2020.00468 32373076 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