Holospora obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 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 obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora caryophila (ex Preer et al. 1974) Preer and Preer 1982 Holospora undulata (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora elegans (ex Hafkine 1890) Preer and Preer 1982 Holospora parva Lanzoni et al. 2016 Holospora obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 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 Gromov B.V. Ossipov D.V. Holospora (ex Hafkine 1890) nom. rev., a genus of bacteria inhabiting the nuclei of paramecia. 1981 31 3 348 352 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-31-3-348 Intracellular symbionts of Paramecium caudatum. Clone M-115 of P. caudatum containing Holospora obtusa has been deposited in the Laboratory of Invertebrate Zoology, Biological Research Institute, Leningrad University. Gromov B.V. Ossipov D.V. Holospora (ex Hafkine 1890) nom. rev., a genus of bacteria inhabiting the nuclei of paramecia. 1981 31 3 348 352 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-31-3-348 Ossipov D.V. Podlipaev S.A. Electron microscope examination of early stages of infection of Paramecium caudatum by bacterial symbionts of the macronucleus (iota-bacteria) 1977 16 289 308 Acta Protozoologica Acta Protozool 0065-1583 Gromov B.V. Ossipov D.V. Holospora (ex Hafkine 1890) nom. rev., a genus of bacteria inhabiting the nuclei of paramecia. 1981 31 3 348 352 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-31-3-348 Hafkine W.M. Maladies infectieuses des paramecies 1890 4 148 162 Annales de l'Institut Pasteur. Microbiologie Ann Inst Pasteur Microbiol 0769-2609 Görtz H.-D. Schwemmler W. Schenk H.E.A. Nucleus-specific symbionts in Paramecium caudatum 1980 1 1 381 392 Endosymbiosis and Cell Biology: A Synthesis of Recent Research; Proceedings of the International Colloquium on Endosymbiosis and Cell Research, Tubingen, April 1980 Walter de Gruyter & Co. Berlin 3111024288