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.