Name: Ancylobacter Raj 1983

Category: Genus

Proposed as: gen. nov.

Etymology: An.cy.lo.bac’ter. Gr. masc. adj. ankylos, crooked, curved; N.L. masc. n. bacter, rod; N.L. masc. n. Ancylobacter, a curved rod

Gender, pronunciation: masculine (stem: Ancylobacter-), an-ky-lo-BAK-ter

Type species: Ancylobacter aquaticus (Ørskov 1928) Raj 1983

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Valid publication: Raj HD. Proposal of Ancylobacter gen. nov. as a substitute for the bacterial genus Microcyclus Ørskov 1928. Int. J. Syst. Bacteriol. 1983; 33:397-398.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    Angulomicrobium Vasil'eva et al. 1986	heterotypic synonym, validly published under the ICNP
    Microcyclus Ørskov 1928 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP, illegitimate name
    Methylorhabdus Doronina et al. 1996	heterotypic synonym, validly published under the ICNP
    Starkeya Kelly et al. 2000	heterotypic synonym, validly published under the ICNP

• Emendations:
  • Doronina et al. 2023 Doronina NV, Chemodurova AA, Grouzdev DS, Koziaeva VV, Agafonova NV, Shi W, Wu L, Kaparullina EN. Ancylobacter moscoviensis sp. nov., novel facultatively methylotrophic bacteria from activated sludge and the reclassification of Starkeya novella (Starkey 1934) Kelly et al. 2000 as Ancylobacter novellus comb. nov., Starkeya koreensis Im et al. 2006 as Ancylobacter koreensis comb.nov., Angulomicrobium tetraedrale Vasil'eva et al. 1986 as Ancylobacter tetraedralis comb. nov., Angulomicrobium amanitiforme Fritz et al. 2004 as Ancylobacter amanitiformis comb. nov., and Methylorhabdus multivorans Doronina et al. 1996 as Ancylobacter multivorans comb. nov., and emended description of the genus Ancylobacter. Antonie Van Leeuwenhoek 2023; 116:153-170. 🇷🇺 Oren A, Göker M. List of changes in taxonomic opinion no. 38. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2023; 73:5923.
    Notes:
    • ⊕ Emendation accompanied by the proposal of 6 new species in the genus.

• Notes:
  • 🧕 Boone et al. (2001) assigned this genus to the family Hyphomicrobiaceae Babudieri 1950 (Approved Lists 1980). Publication: Garrity GM, Holt JG. The Road Map to the Manual. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, p. 119-166. 🇺🇸
  • 🚋 The type species of this genus has alternatively been placed in the genus Microcyclus Ørskov 1928 (Approved Lists 1980). Publication: Oerskov J. Beschreibung eines neuen Mikroben, Microcyclus aquaticus, mit eigentümlicher Morphologie. Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Abteilung I. 1928; 107:180-184.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Ancyclobacter"; "Ancyfobacter"; "Ancytobacter".
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of Doronina et al. (2023). Editors in search of reviewers are advised to consider additional criteria such as whether a taxon is covered by one of the ICSP subcommittees.
  • 🎰 The BRCs most frequently used for deposits in this group are: DSM: 15; VKM: 13; JCM: 6; CCUG: 6; NCIMB: 4; NBRC: 4; KCTC: 4; ATCC: 3; MCCC: 3; CGMCC: 3.
  • 🧍 Pittman et al. (1991) suggested the abbreviation "AYBT" for this genus name but this does not appear to be of practical relevance any longer. Publication: Pittman KF, Walczak CA, Lock CM. Codes and abbreviations for approved of effectively published names of genera of bacteria published from January 1980 to December 1990. Int J Syst Bacteriol 1991; 41:571-579.
  • 🧍 Replacement of the illegitimate name Microcyclus Ørskov 1928 (Approved Lists 1980), which is illegitimate because of precedence of the fungal genus Microcyclus Saccardo 1904 [Rule 51b (4)]. Publication: Oerskov J. Beschreibung eines neuen Mikroben, Microcyclus aquaticus, mit eigentümlicher Morphologie. Zentralblatt fur Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Abteilung I 1928; 107:180-184.

Subdivision:

Number of child taxa with a validly published and correct name: 22
Number of child taxa with a validly published name, including synonyms: 22
Total number of child taxa: 24

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Ancylobacter abiegnus" Zaichikova et al. 2010	not validly published	preferred name
    Ancylobacter amanitiformis (Fritz et al. 2004) Doronina et al. 2023	validly published under the ICNP	correct name
    Ancylobacter aquaticus (Ørskov 1928) Raj 1983	validly published under the ICNP	correct name
    Ancylobacter crimeensis Belova et al. 2024	validly published under the ICNP	correct name
    Ancylobacter defluvii Poroshina et al. 2014	validly published under the ICNP	correct name
    Ancylobacter dichloromethanicus Firsova et al. 2010	validly published under the ICNP	correct name
    Ancylobacter gelatini Wang et al. 2023	validly published under the ICNP	correct name
    Ancylobacter koreensis (Im et al. 2006) Doronina et al. 2023	validly published under the ICNP	correct name
    Ancylobacter lacus Chemodurova et al. 2020	validly published under the ICNP	correct name
    Ancylobacter mangrovi Li et al. 2024	validly published under the ICNP	correct name
    Ancylobacter moscoviensis Doronina et al. 2023	validly published under the ICNP	correct name
    Ancylobacter multivorans (Doronina et al. 1996) Doronina et al. 2023	validly published under the ICNP	correct name
    "Ancylobacter natronum" Doronina et al. 2001	not validly published	preferred name
    Ancylobacter novellus (Starkey 1934) Doronina et al. 2023	validly published under the ICNP	correct name
    Ancylobacter oerskovii Lang et al. 2008	validly published under the ICNP	correct name
    Ancylobacter plantiphilus Chemodurova et al. 2020	validly published under the ICNP	correct name
    Ancylobacter polymorphus Xin et al. 2006	validly published under the ICNP	correct name
    Ancylobacter pratisalsi Suarez et al. 2017	validly published under the ICNP	correct name
    Ancylobacter radicis Agafonova et al. 2023	validly published under the ICNP	correct name
    Ancylobacter rudongensis Xin et al. 2004	validly published under the ICNP	correct name
    Ancylobacter sonchi Agafonova et al. 2017	validly published under the ICNP	correct name
    Ancylobacter terrae Lu et al. 2025	validly published under the ICNP	correct name
    Ancylobacter tetraedralis (Vasil'eva et al. 1986) Doronina et al. 2023	validly published under the ICNP	correct name
    Ancylobacter vacuolatus Xin et al. 2006	validly published under the ICNP	correct name

Parent taxon: Xanthobacteraceae Lee et al. 2005

Assigned by: Lee KB, Liu CT, Anzai Y, Kim H, Aono T, Oyaizu H. The hierarchical system of the 'Alphaproteobacteria': description of Hyphomonadaceae fam. nov., Xanthobacteraceae fam. nov. and Erythrobacteraceae fam. nov. Int J Syst Evol Microbiol 2005; 55:1907-1919. 🇯🇵

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Record number: 515134