Name: Methylococcaceae Whittenbury and Krieg 1984

Category: Family

Proposed as: fam. nov.

Etymology: Me.thy.lo.coc.ca’ce.ae. N.L. masc. n. Methylococcus, type genus of the family; L. fem. pl. n. suff. -aceae, ending to denote a family; N.L. fem. pl. n. Methylococcaceae, the Methylococcus family

Pronunciation (Latin), gender: me-t^hy-lo-kok-KA-ke-a͡e, feminine

Type genus: Methylococcus Foster and Davis 1966 (Approved Lists 1980)

Effective publication: Whittenbury R, Krieg NR. Family Methylococcaceae. In: Krieg NR, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 1., The Williams & Wilkins Co., Baltimore, 1984, p. 256-261.

IJSEM list: Anonymous. Validation list no. 15. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1984; 34:355-357.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Methylomonadaceae" Leadbetter 1974	heterotypic synonym, not validly published

• Emendations:
  • Bowman et al. 1993 Bowman JP, Sly LI, Nichols PD, Hayward AC. Revised taxonomy of the methanotrophs: description of Methylobacter gen. nov., emendation of Methylococcus, validation of Methylosinus and Methylocystis species, and a proposal that the family Methylococcaceae includes only the group I methanotrophs. Int. J. Syst. Bacteriol. 1993; 43:735-753. 🇦🇺 Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 43, part 4 of the IJSB. Int J Syst Bacteriol 1994; 44:184.
    Notes:
    • ⊕ Emendation accompanied by the inclusion of 3 genera in the family.

• Notes:
  • 🧕 Bowman et al. (1993) assigned this family to the class Proteobacteria Stackebrandt et al. 1988. Publication: Bowman JP, Sly LI, Nichols PD, Hayward AC. Revised taxonomy of the methanotrophs: description of Methylobacter gen. nov., emendation of Methylococcus, validation of Methylosinus and Methylocystis species, and a proposal that the family Methylococcaceae includes only the group I methanotrophs. Int. J. Syst. Bacteriol. 1993; 43:735-753. 🇦🇺
  • 🧕 Bowman et al. (1993) assigned this family to the phylum "Proteobacteria". Publication: Bowman JP, Sly LI, Nichols PD, Hayward AC. Revised taxonomy of the methanotrophs: description of Methylobacter gen. nov., emendation of Methylococcus, validation of Methylosinus and Methylocystis species, and a proposal that the family Methylococcaceae includes only the group I methanotrophs. Int. J. Syst. Bacteriol. 1993; 43:735-753. 🇦🇺
  • 🧕 Cavalier-Smith (2002) assigned this family to the class "Chromatibacteria" Cavalier-Smith 2002. Publication: Cavalier-Smith T. The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification. Int J Syst Evol Microbiol 2002; 52:7-76. 🇬🇧
  • 🧒 Bowman (2014) assigned the genus Crenothrix Cohn 1870 (Approved Lists 1980) to this family. Publication: Bowman JP. The Family Methylococcaceae. In: Rosenberg E, Delong EF, Lory S, Stackebrandt E, Thompson F (eds), The Prokaryotes, Springer-Verlag, Berlin Heidelberg, 2014, p. 411-441. 🇦🇺
  • 🧒 Heyer et al. (2005) assigned the genus Methylohalobius Heyer et al. 2005 to this family. Publication: Heyer J, Berger U, Hardt M, Dunfield PF. Methylohalobius crimeensis gen. nov., sp. nov., a moderately halophilic, methanotrophic bacterium isolated from hypersaline lakes of Crimea. Int J Syst Evol Microbiol 2005; 55:1817-1826. 🇳🇿
  • 🧒 Ludwig et al. (2021) assigned the genus Methylomarinovum Hirayama et al. 2014 to this family. Publication: Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218. 🇪🇸
  • 🧒 Yilmaz et al. (2014) assigned the genus "Methylothermus" Tsubota et al. 2005 to this family. Publication: Yilmaz P, Parfrey LW, Yarza P, Gerken J, Pruesse E, Quast C, Schweer T, Peplies J, Ludwig W, Glöckner FO. The SILVA and “all-species living tree project (LTP)” taxonomic frameworks. Nucleic Acids Research 2014; 42(D1):D643-D648. 🇩🇪
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Methyfococcaceae"; "Methyloccocaceae"; "Methylococca"; "Methylococccaceae".
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of Deutzmann et al. (2014). 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: 25; ATCC: 24; NCIMB: 20; JCM: 19; VKM: 15; LMG: 9; KCTC: 9; NBRC: 5; MCC: 4; UQM: 3.

Subdivision:

Number of child taxa with a validly published and correct name: 18
Number of child taxa with a validly published name, including synonyms: 18
Total number of child taxa: 25

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Candidatus Methanofishera" Russell et al. 2020	not validly published	pro-correct name
    Methylicorpusculum Saidi-Mehrabad et al. 2020	validly published under the ICNP	correct name
    Methylobacter Bowman et al. 1993	validly published under the ICNP	correct name
    Methylocaldum Bodrossy et al. 1998	validly published under the ICNP	correct name
    "Candidatus Methylocalor" Liu et al. 2024	not validly published	preferred name
    Methylococcus Foster and Davis 1966 (Approved Lists 1980)	validly published under the ICNP	correct name
    "Candidatus Methylocucumis" Pandit et al. 2018	not validly published	synonym
    Methylocucumis Pandit and Rahalkar 2019	validly published under the ICNP	correct name
    Methylogaea Geymonat et al. 2011	validly published under the ICNP	correct name
    Methyloglobulus Deutzmann et al. 2015	validly published under the ICNP	correct name
    "Methylolobus" Rahalkar et al. 2020	not validly published	preferred name
    Methylomagnum Khalifa et al. 2015	validly published under the ICNP	correct name
    Methylomarinum Hirayama et al. 2013	validly published under the ICNP	correct name
    Methylomicrobium Bowman et al. 1995	validly published under the ICNP	correct name
    Methylomonas (ex Leadbetter 1974) Whittenbury and Krieg 1984	validly published under the ICNP	correct name
    Methyloparacoccus Hoefman et al. 2014	validly published under the ICNP	correct name
    Methyloprofundus Tavormina et al. 2015	validly published under the ICNP	correct name
    Methylosarcina Wise et al. 2001	validly published under the ICNP	correct name
    Methylosoma Rahalkar et al. 2007	validly published under the ICNP	correct name
    Methylosphaera Bowman et al. 1998	validly published under the ICNP	correct name
    "Candidatus Methylospira" Danilova et al. 2016	not validly published	pro-correct name
    Methyloterricola Frindte et al. 2017	validly published under the ICNP	correct name
    "Methylotetracoccus" Ghashghavi et al. 2019	not validly published	synonym
    "Methylovarius" Romanovskaya 1984	not validly published	preferred name
    Methylovulum Iguchi et al. 2011	validly published under the ICNP	correct name

Parent taxon: Methylococcales Bowman 2005

Assigned by: Bowman JP. Order VII. Methylococcales ord. nov. In: Brenner DJ, Krieg NR, Staley JT, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 2 (The Proteobacteria), part B (The Gammaproteobacteria), Springer, New York, 2005, p. 248-252. 🇺🇸

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Record number: 857