Name: Methanocaldococcus Whitman 2002

Category: Genus

Proposed as: gen. nov.

Etymology: Me.tha.no.cal.do.coc’cus. N.L. neut. n. methanum, methane; from French masc. n. méthyle; from Chem. neut. suff. -ane; N.L. pref. methano-, pertaining to methane (in compound words); L. masc. adj. caldus, hot; N.L. masc. n. coccus, coccus; from Gr. masc. n. kokkos, grain, seed; N.L. masc. n. Methanocaldococcus, a coccus producing methane at hyperthermophilic growth temperatures

Gender, pronunciation (Latin): masculine (stem: Methanocaldococc-), me-t^ha-no-kal-do-KOK-kus

Type species: Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Effective publication: Whitman WB. Genus I. Methanocaldococcus gen. nov. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 1 (The Archaea and the Deeply Branching and Phototrophic Bacteria), Springer, New York, 2001, p. 243-245. 🇺🇸

IJSEM list: Anonymous. Validation list no. 85. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2002; 52:685-690.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 1

• Synonyms:

  • Name	Kind
    "Methanocaldococcus" Boone et al. 1993	homotypic synonym, not validly published

• Notes:
  • 🥇 Nomenclatural type of the family Methanocaldococcaceae Whitman et al. 2002. Publication: Whitman WB, Boone DR, Koga Y. Family II. Methanocaldococcaceae fam. nov. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 1 (The Archaea and the Deeply Branching and Phototrophic Bacteria), Springer, New York, 2001, p. 242-246. 🇺🇸
  • 🚋 The type species of this genus has alternatively been placed in the genus Methanococcus Kluyver and van Niel 1936 (Approved Lists 1980). Publication: Jones WJ, Leigh JA, Mayer F, Woese CR, Wolfe RS. Methanococcus jannaschii sp. nov., an extremely thermophilic methanogen from a submarine hydrothermal vent. Arch. Microbiol. 1983; 136:254-261.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Methanocaldococcus" Boone et al. 1993. Publication: Boone, R D, Whitman WB, Rouviere P. Diversity and taxonomy of methanogens. In: Ferry JG (eds), Methanogenesis, Chapman and Hall, Inc., New York, 1993, p. 35-80. 🇺🇸
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Methanocaldococcoccus"; "Methanocaldocococcus".
  • 🖹 Minimal standards for the description of new taxa in this group were published in 2023. Publication: Prakash O, Dodsworth JA, Dong X, Ferry JG, L'Haridon S, Imachi H, Kamagata Y, Rhee SK, Sagar I, Shcherbakova V, et al. Proposed minimal standards for description of methanogenic archaea. Int J Syst Evol Microbiol 2023; 73:5500. 🇮🇳
  • 💁 Taxonomists who have recently focused on this group are the corresponding authors of LHaridon and Nesboe (2026), Jeanthon et al. (1999). 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: 9; JCM: 7; ATCC: 2; CIP: 1; NBRC: 1; KACC: 1; OCM: 1.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Human classification RG: not given - Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.

Subdivision:

Number of child taxa with a validly published and correct name: 9
Number of child taxa with a validly published name, including synonyms: 9
Total number of child taxa: 9

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Methanocaldococcus abyssi L'Haridon and Nesbø 2026	validly published under the ICNP	correct name
    Methanocaldococcus bathoardescens Stewart et al. 2015	validly published under the ICNP	correct name
    Methanocaldococcus fervens (Jeanthon et al. 1999) Whitman 2002	validly published under the ICNP	correct name
    Methanocaldococcus indicus L'Haridon et al. 2003	validly published under the ICNP	correct name
    Methanocaldococcus infernus (Jeanthon et al. 1998) Whitman 2002	validly published under the ICNP	correct name
    Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002	validly published under the ICNP	correct name
    Methanocaldococcus lauensis L'Haridon et al. 2023	validly published under the ICNP	correct name
    Methanocaldococcus villosus Bellack et al. 2011	validly published under the ICNP	correct name
    Methanocaldococcus vulcanius (Jeanthon et al. 1999) Whitman 2002	validly published under the ICNP	correct name

Parent taxon: Methanocaldococcaceae Whitman et al. 2002

Assigned by: Whitman WB, Boone DR, Koga Y. Family II. Methanocaldococcaceae fam. nov. In: Boone DR, Castenholz RW, Garrity GM (eds), Bergey's Manual of Systematic Bacteriology, 2nd edn, vol. 1 (The Archaea and the Deeply Branching and Phototrophic Bacteria), Springer, New York, 2001, p. 242-246. 🇺🇸

Linking: To permanently link to this page, use https://lpsn.dsmz.de/genus/methanocaldococcusCopy to clipboardLink copied to clipboard

Record number: 516048