Rhodocyclales

Rhodocyclales
	Two strains of Zoogloea resiniphila. Wild type is on the left. The right is a strain unable to form floc.
Scientific classification
Domain:	Bacteria
Phylum:	Pseudomonadota
Class:	Betaproteobacteria
Order:	Rhodocyclales; Boden et al. 2017 (Garrity, et al 2006)
Families
	Rhodocyclaceae; Azonexaceae; Zoogloeaceae;

The Rhodocyclales ^[1] are an order of the class Betaproteobacteria in the phylum Pseudomonadota ("Proteobacteria").^[2] Following a major reclassification of the class in 2017, the previously monofamilial order was split into three families:

Rhodocyclaceae (type family) contains the genera Rhodocyclus (type genus), Azospira and Propionivibrio. Cells are curved rods, rings or spirillae. Dominant respiratory quinones are menaquinone-8, ubiquinone-8 and rhodoquinone-8. G+C fractions are 61.6 - 65.3 mol%.^[1]
Azonexaceae contains the genera Azonexus (type genus), Dechloromonas, Ferribacterium and Quatrionicoccus. Cells are curved rods or cocci. Dominant respiratory quinone is ubiquinone-8. G+C fractions are 63.5 - 67.0 mol%.^[1]
Zoogloeaceae contains the genera Zoogloea (type genus), Thauera, Uliginosibacterium and Azoarcus. Cells are rod shaped. Dominant respiratory quinones are ubiquinone-8 and rhodoquinone-8. G+C fractions are 59.3 - 69.0 mol%.^[1]

The genus Azovibrio also falls within the order but is incertae sedis, falling between the Zoogloeaeceae and the Azonexaceae.

References

^ ^a ^b ^c ^d ^e ^f ^g Boden, R; Hutt, LP, Rae AW (2017). "Reclassification of Thiobacillus aquaesulis (Wood & Kelly, 1995) as Annwoodia aquaesulis gen. nov., comb. nov., transfer of Thiobacillus (Beijerinck, 1904) from the Hydrogenophilales to the Nitrosomonadales, proposal of Hydrogenophilalia class. nov. within the 'Proteobacteria', and four new families within the orders Nitrosomonadales and Rhodocyclales". International Journal of Systematic and Evolutionary Microbiology. 67 (5): 1191–1205. doi:10.1099/ijsem.0.001927. hdl:10026.1/8740. PMID 28581923.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN 978-0-387-24145-6.

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[Boden-1] ^ ^a ^b ^c ^d ^e ^f ^g Boden, R; Hutt, LP, Rae AW (2017). "Reclassification of Thiobacillus aquaesulis (Wood & Kelly, 1995) as Annwoodia aquaesulis gen. nov., comb. nov., transfer of Thiobacillus (Beijerinck, 1904) from the Hydrogenophilales to the Nitrosomonadales, proposal of Hydrogenophilalia class. nov. within the 'Proteobacteria', and four new families within the orders Nitrosomonadales and Rhodocyclales". International Journal of Systematic and Evolutionary Microbiology. 67 (5): 1191–1205. doi:10.1099/ijsem.0.001927. hdl:10026.1/8740. PMID 28581923.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[BergeyAlpha-2] Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN 978-0-387-24145-6.

[1]

[2]

Rhodocyclales

Two strains of Zoogloea resiniphila. Wild type is on the left. The right is a strain unable to form floc.
Scientific classification
Domain:	Bacteria
Phylum:	Pseudomonadota
Class:	Betaproteobacteria
Order:	Rhodocyclales Boden et al. 2017 (Garrity, et al 2006)
Families
Rhodocyclaceae^[1] Azonexaceae^[1] Zoogloeaceae^[1]