Methylocystaceae Bowman 2006 emend. Hördt et al. 2020 Methylocystis (ex Whittenbury et al. 1970) Bowman et al. 1993 emend. Belova et al. 2013 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 Hyphomicrobiales Douglas 1957 (Approved Lists 1980) emend. Hördt et al. 2020 Methylocystaceae Bowman 2006 emend. Hördt et al. 2020 Hyphomicrobiales Douglas 1957 (Approved Lists 1980) emend. Hördt et al. 2020 Hyphomicrobiaceae Babudieri 1950 (Approved Lists 1980) emend. Hördt et al. 2020 Afifellaceae Hördt et al. 2020 Ahrensiaceae Hördt et al. 2020 Amorphaceae Hördt et al. 2020 Aurantimonadaceae Hördt et al. 2020 Blastochloridaceae Hördt et al. 2020 Boseaceae Hördt et al. 2020 Breoghaniaceae Hördt et al. 2020 Devosiaceae Hördt et al. 2020 Kaistiaceae Hördt et al. 2020 Parvibaculaceae Hördt et al. 2020 Phreatobacteraceae Hördt et al. 2020 Pleomorphomonadaceae Hördt et al. 2020 Pseudoxanthobacteraceae Hördt et al. 2020 Stappiaceae Hördt et al. 2020 Tepidamorphaceae Hördt et al. 2020 Ancalomicrobiaceae Dahal et al. 2018 emend. Felföldi et al. 2019 Bartonellaceae Gieszczykiewicz 1939 (Approved Lists 1980) emend. Brenner et al. 1993 Beijerinckiaceae Garrity et al. 2006 emend. Hördt et al. 2020 Nitrobacteraceae Buchanan 1917 (Approved Lists 1980) emend. Hördt et al. 2020 Brucellaceae Breed et al. 1957 (Approved Lists 1980) Chelatococcaceae Dedysh et al. 2016 Cohaesibacteraceae Hwang and Cho 2008 emend. Hördt et al. 2020 Methylobacteriaceae Garrity et al. 2006 emend. Hördt et al. 2020 Notoacmeibacteraceae Huang et al. 2017 emend. Hördt et al. 2020 Phyllobacteriaceae Mergaert and Swings 2006 emend. Hördt et al. 2020 Rhizobiaceae Conn 1938 (Approved Lists 1980) emend. Hördt et al. 2020 Rhodobiaceae Garrity et al. 2006 emend. Hördt et al. 2020 Xanthobacteraceae Lee et al. 2005 emend. Hördt et al. 2020 Acuticoccaceae Lai et al. 2019 Incertae sedis 664 Nakai et al. 2021 Pleomorphomonas Xie and Yokota 2005 Methylopila Doronina et al. 1998 Terasakiella Satomi et al. 2002 emend. Yoon and Kang 2018 Methylosinus (ex Wittenbury et al. 1970) Bowman et al. 1993 Albibacter Doronina et al. 2001 emend. Yang et al. 2016 Methylocystis (ex Whittenbury et al. 1970) Bowman et al. 1993 emend. Belova et al. 2013 Hansschlegelia Ivanova et al. 2010 Chenggangzhangella Yang et al. 2016 Chthonobacter Kim et al. 2017 Kim D. Kang K. Ahn T.-Y. 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Hansschlegelia zhihuaiae sp. nov., isolated from a polluted farmland soil 2011 61 5 1114 1117 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.021543-0 20543155 Bowman J.P. Garrity G.M. Brenner D.J. Krieg N.R. Staley J.T. Family V. Methylocystaceae fam. nov. 2005 2, Part C 2 411 413 Bergey's Manual of Systematic Bacteriology Springer New York 0387241450 Hördt A. García-López M. Meier-Kolthoff J.P. Tindall B.J. Weinhold L.-M. Gronow S. Kyrpides N. Woyke T. Schleuning M. Göker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria 2020 11 468 Frontiers in Microbiology Front. Microbio. 1664-302X 10.3389/fmicb.2020.00468 32373076