Holospora caryophila (ex Preer et al. 1974) Preer and Preer 1982 Holospora caryophila (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 Holosporales Szokoli et al. 2020 Holosporaceae Görtz and Schmidt 2006 emend. Szokoli et al. 2016 Holospora (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora caryophila (ex Preer et al. 1974) Preer and Preer 1982 Holospora (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora undulata (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora elegans (ex Hafkine 1890) Preer and Preer 1982 Holospora obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora parva Lanzoni et al. 2016 Holospora caryophila (ex Preer et al. 1974) Preer and Preer 1982 Cytophaga caryophila Preer et al. 1974 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 Note: Verified that there is no sequence data available (May 1, 2018). Found in the macronucleus, but not micronucleus of Paramecium aurelia, stock 562, syngen 2 (ATCC 30694). 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 Cytophaga caryophila Preer et al. 1974 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