Proteocatella sphenisci Pikuta et al. 2009 Proteocatella sphenisci Pikuta et al. 2009 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Firmicutes (sic) Gibbons and Murray 2021 Bacillota corrig. Gibbons and Murray 2021 Firmacutes (sic) Gibbons and Murray 2021 Clostridia Rainey 2010 Eubacteriales Buchanan 1917 (Approved Lists 1980) emend. Tindall 2019 Clostridiaceae Pribram 1933 (Approved Lists 1980) emend. Spring 2021 Proteocatella Pikuta et al. 2009 Proteocatella sphenisci Pikuta et al. 2009 Proteocatella Pikuta et al. 2009 Proteocatella sphenisci Pikuta et al. 2009 Pikuta E.V. Hoover R.B. Marsic D. Whitman W.B. Lupa B. Tang J. Krader P. Proteocatella sphenisci gen. nov., sp. nov., a psychrotolerant, spore-forming anaerobe isolated from penguin guano 2009 59 9 2302 2307 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.002816-0 19620379 Pikuta E.V. Hoover R.B. Marsic D. Whitman W.B. Lupa B. Tang J. Krader P. Proteocatella sphenisci gen. nov., sp. nov., a psychrotolerant, spore-forming anaerobe isolated from penguin guano 2009 59 9 2302 2307 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.002816-0 19620379 Pikuta E.V. Hoover R.B. Marsic D. Whitman W.B. Lupa B. Tang J. Krader P. Proteocatella sphenisci gen. nov., sp. nov., a psychrotolerant, spore-forming anaerobe isolated from penguin guano 2009 59 9 2302 2307 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.002816-0 19620379