Accepted families •
Aestuariivirgaceae Li
et al. 2019 •
Afifellaceae Hördt
et al. 2020 •
Ahrensiaceae Hördt
et al. 2020 •
Alsobacteraceae Sun
et al. 2018 •
Amorphaceae Hördt
et al. 2020 •
Ancalomicrobiaceae Dahal
et al. 2018 •
Aurantimonadaceae Hördt
et al. 2020 •
Bartonellaceae Gieszczykiewicz 1939 (Approved Lists 1980) •
Beijerinckiaceae Garrity
et al. 2006 •
Blastochloridaceae Hördt
et al. 2020 •
Boseaceae Hördt
et al. 2020 •
Breoghaniaceae Hördt
et al. 2020 •
Brucellaceae Breed
et al. 1957 (Approved Lists 1980) •
Chelatococcaceae Dedysh
et al. 2016 •
Cohaesibacteraceae Hwang and Cho 2008 •
Devosiaceae Hördt
et al. 2020 •
Hyphomicrobiaceae Babudieri 1950 (Approved Lists 1980) •
Kaistiaceae Hördt
et al. 2020 •
Lichenibacteriaceae Pankratov
et al. 2020 •
Lichenihabitantaceae Noh
et al. 2019 •
Methylobacteriaceae Garrity
et al. 2006 •
Methylocystaceae Bowman 2006 •
Nitrobacteraceae corrig. Buchanan 1917 (Approved Lists 1980) •
Notoacmeibacteraceae Huang
et al. 2017 •
Parvibaculaceae Hördt
et al. 2020 •
Phreatobacteraceae Hördt
et al. 2020 •
Phyllobacteriaceae Mergaert and Swings 2006 •
Pleomorphomonadaceae Hördt
et al. 2020 •
Pseudoxanthobacteraceae Hördt
et al. 2020 •
Rhabdaerophilaceae Ming
et al. 2020 •
Rhizobiaceae Conn 1938 (Approved Lists 1980) •
Rhodobiaceae Garrity
et al. 2006 •
Roseiarcaceae Kulichevskaya
et al. 2014 •
Salinarimonadaceae Cole
et al. 2018 •
Segnochrobactraceae Akter
et al. 2020 •
Stappiaceae Hördt
et al. 2020 •
Tepidamorphaceae Hördt
et al. 2020 •
Xanthobacteraceae Lee
et al. 2005
Unassigned genera The following genus has not been assigned to a family: •
Flaviflagellibacter Dong
et al. 2019
Provisional taxa These taxa have been published, but have not been validated according to the
Bacteriological Code: • "
Nordella" La Scola
et al. 2004 • "
Propylenellaceae" Liu
et al. 2021 • "
Propylenella" Liu
et al. 2021 ==Phylogeny==