Piscirickettsia Fryer et al. 1992 Piscirickettsia salmonis Fryer et al. 1992 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 Gammaproteobacteria Garrity et al. 2005 emend. Williams and Kelly 2013 Thiotrichales Garrity et al. 2005 Piscirickettsiaceae Fryer and Lannan 2005 emend. Dumler et al. 2001 Piscirickettsia Fryer et al. 1992 Piscirickettsiaceae Fryer and Lannan 2005 emend. Dumler et al. 2001 Methylophaga Janvier et al. 1985 emend. Boden 2012 Cycloclasticus Dyksterhouse et al. 1995 Sulfurivirga Takai et al. 2006 Thiomicrospira Kuenen and Veldkamp 1972 (Approved Lists 1980) emend. Boden et al. 2017 Hydrogenovibrio Nishihara et al. 1991 emend. Boden et al. 2017 Thialkalimicrobium (sic) Sorokin et al. 2001 emend. Sorokin et al. 2002 Thioalkalimicrobium (sic) Sorokin et al. 2001 emend. Sorokin et al. 2002 Galenea Giovannelli et al. 2012 Thiomicrorhabdus Boden et al. 2017 emend. Liu et al. 2021 Thiosulfativibrio Mochizuki et al. 2022 Thiosulfatimonas Mochizuki et al. 2022 Piscirickettsia salmonis Fryer et al. 1992 Fryer J.L. Lannan C.N. Giovannoni S.J. Wood N.D. Piscirickettsia salmonis gen. nov., sp. nov., the causative agent of an epizootic disease in salmonid fishes. 1992 42 1 120 126 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-42-1-120 1371057 Fryer J.L. Lannan C.N. Garrity G.M. Brenner D.J. Krieg N.R. Staley J.T. Family II. Piscirickettsiaceae fam. nov. 2005 2, Part B 2 180 Bergey's Manual of Systematic Bacteriology Springer New York 0387241442