Holospora undulata (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 undulata (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 elegans (ex Hafkine 1890) Preer and Preer 1982 Holospora obtusa (ex Hafkine 1890) Gromov and Ossipov 1981 Holospora parva Lanzoni et al. 2016 Holospora undulata (ex Hafkine 1890) Gromov and Ossipov 1981 Boscaro V. Fokin S.I. Schrallhammer M. Schweikert M. Petroni G. Revised systematics of Holospora-like bacteria and characterization of "Candidatus Gortzia infectiva", a novel macronuclear symbiont of Paramecium jenningsi. 2013 65 1 255 267 Microbial Ecology Microb Ecol 0095-3628 1432-184X 10.1007/s00248-012-0110-2 22940732 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 The type deposit is the original description given by Hafkine 1890. Intracellular symbionts of Paramecium caudatum. Clone M1-48 of P. caudatum containing Holospora undulata has been deposited in the Laboratory of Invertebrate Zoology, Biological Research Institute, Leningrad University. Boscaro et al. 2013 assert that strain StB is also type material. 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