Incertae sedis 288 Gruber-Vodicka et al. 2011 Riegeria Gruber-Vodicka et al. 2011 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 Alphaproteobacteria Garrity et al. 2006 Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980) emend. Hördt et al. 2020 Incertae sedis 288 Gruber-Vodicka et al. 2011 Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980) emend. Hördt et al. 2020 Rhodospirillaceae Pfennig and Trüper 1971 (Approved Lists 1980) emend. Hördt et al. 2020 Acetobacteraceae (ex Henrici 1939) Gillis and De Ley 1980 emend. Hördt et al. 2020 Geminicoccaceae Proença et al. 2018 emend. Hördt et al. 2020 Incertae sedis 544 Thiel et al. 2016 Elioraeaceae Habib et al. 2020 Azospirillaceae Hördt et al. 2020 Kiloniellaceae Wiese et al. 2009 emend. Hördt et al. 2020 Riegeria Gruber-Vodicka et al. 2011 Gruber-Vodicka H.R. Dirks U. Leisch N. Baranyi C. Stoecker K. Bulgheresi S. Heindl N.R. Horn M. Lott C. Loy A. Wagner M. Ott J. Paracatenula, an ancient symbiosis between thiotrophic Alphaproteobacteria and catenulid flatworms. 2011 108 29 12078 12083 Proceedings of the National Academy of Sciences of the United States of America Proc Natl Acad Sci U S A 0027-8424 1091-6490 10.1073/pnas.1105347108 21709249