Name: Methanobacterium defluvii Kotelnikova et al. 1994

Category: Species

Proposed as: sp. nov.

Etymology: de.flu’vi.i. L. gen. neut. n. defluvii, of sewage

Gender: neuter

Type strain: ADZ; ATCC 51443; DSM 7466; OCM 570; VKM B-1962

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: X99046 Analyse FASTA

Effective publication: Kotelnikova SV, Obraztsova AY, Gongadze GM, Laurinavichius KS. Methanobacterium thermoflexum sp. nov. and Methanobacterium defluvii sp. nov., thermophilic rodshaped methanogens isolated from anaerobic digester sludge. Syst. Appl. Microbiol. 1993; 16:427-435.

IJSEM list: Anonymous. Validation list no. 48. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1994; 44:182-183.

Nomenclatural status: validly published under the ICNP

Taxonomic status: synonym

Correct name: Methanothermobacter defluvii (Kotelnikova et al. 1994) Boone 2002

Risk group: 1

• Synonyms:

  • Name	Kind
    Methanothermobacter defluvii (Kotelnikova et al. 1994) Boone 2002	homotypic synonym, validly published under the ICNP

• Notes:
  • Methanobacterium defluvii is the correct name if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Methanobacterium.
  • However, this new combination was not described according to the Rules of the Bacteriological Code (1990 Revision), and it was not cited in the Notification List published in the March 2000 issue of the IJSEM [2]. Publication: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 50, part 1 of the IJSEM. Int J Syst Evol Microbiol 2000; 50:425-426.
  • In the January 2000 issue of the International Journal of Systematic and Evolutionary Microbiology, Wasserfallen et al. [1] proposed to transfer Methanobacterium defluvii Kotelnikova et al. 1994 into the new genus Methanothermobacter as "Methanothermobacter defluvii" (Kotelnikova et al. 1994) Wasserfallen et al. 2000, comb. nov. However, this new combination was not described according to the Rules of the Bacteriological Code (1990 Revision), and it was not cited in the Notification List published in the March 2000 issue of the IJSEM [2]. Later, Methanothermobacter defluvii was listed in the second edition of the Bergey's Manual of Systematic Bacteriology [3] and it was validly published in Validation List no. 85 (Cf. infra) [4]. Publication: Wasserfallen A, Nolling J, Pfister P, Reeve J, Conway de Macario E. Phylogenetic analysis of 18 thermophilic Methanobacterium isolates supports the proposals to create a new genus, Methanothermobacter gen. nov., and to reclassify several isolates in three species, Methanothermobacter thermautotrophicus comb. nov., Methanothermobacter wolfeii comb. nov., and Methanothermobacter marburgensis sp. nov. Int J Syst Evol Microbiol 2000; 50:43-53.
  • Later, Methanothermobacter defluvii was listed in the second edition of the Bergey's Manual of Systematic Bacteriology [3] and it was validly published in Validation List no. 85 (Cf. infra) [4]. Publication: Boone DR. Genus IV. Methanothermobacter Wasserfallen, Nölling, Pfister, Reeve and Conway de Macario 2000, 51VP. 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. 230-233.

Parent taxon: Methanobacterium Kluyver and van Niel 1936 (Approved Lists 1980)

Assigned by: Kotelnikova SV, Obraztsova AY, Gongadze GM, Laurinavichius KS. Methanobacterium thermoflexum sp. nov. and Methanobacterium defluvii sp. nov., thermophilic rodshaped methanogens isolated from anaerobic digester sludge. Syst. Appl. Microbiol. 1993; 16:427-435.

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Record number: 777793