Serpens flexibilis Hespell 1977 (Approved Lists 1980) 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 Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980) emend. Liao et al. 2020 Pseudomonadaceae Winslow et al. 1917 (Approved Lists 1980) Pseudomonas Migula 1894 (Approved Lists 1980) emend. Yang et al. 2013 Serpens flexibilis Hespell 1977 (Approved Lists 1980) Pseudomonas Migula 1894 (Approved Lists 1980) emend. Yang et al. 2013 Pseudomonas flexibilis (Hespell 1977) Shin et al. 2016 Serpens flexibilis Hespell 1977 (Approved Lists 1980) Hespell R.B. Serpens flexibilis gen. nov., sp. nov., an unusually flexible lactate-oxidizing bacterium. 1977 27 4 371 381 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-27-4-371 Shin S.K. Hwang C.Y. Cho Y.J. Yi H. Reclassification of Serpens flexibilis Hespell 1977 as Pseudomonas flexibilis comb. nov., with Pseudomonas tuomuerensis Xin et al. 2009 as a later heterotypic synonym 2015 38 8 563 566 Systematic and Applied Microbiology Syst Appl Microbiol 0723-2020 10.1016/j.syapm.2015.09.007 26516088 Hespell R.B. Serpens flexibilis gen. nov., sp. nov., an unusually flexible lactate-oxidizing bacterium. 1977 27 4 371 381 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-27-4-371