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).