Name: Methylacidiphilum Ratnadevi et al. 2023

Category: Genus

Proposed as: gen. nov.

Etymology: Me.thyl.a.ci.di’phi.lum. N.L. neut. n. methyl, the methyl group; L. masc. adj. acidus, sour; Gr. neut. adj. philon, someone beloved, someone dearly loved; N.L. neut. adj. suff. -philum, dearly loved; N.L. neut. n. Methylacidiphilum, a methyl-using acid-lover

Gender, pronunciation: neuter (stem: Methylacidiphil-), me-t^hyl-a-ki-DI-p^hi-lum

Type species: Methylacidiphilum kamchatkense Ratnadevi et al. 2023

Conduct genome-based taxonomy of genus at TYGS

16S rRNA gene: Analyse FASTA

Valid publication: Ratnadevi CM, Erikstad H-A, Kruse T, Birkeland N-K. Methylacidiphilum kamchatkense gen. nov., sp. nov., an extremely acidophilic and moderately thermophilic methanotroph belonging to the phylum Verrucomicrobiota. International Journal of Systematic and Evolutionary Microbiology 2023; 73:0.

IJSEM list: Oren A, Göker M. Notification list. Notification that new names and new combinations have appeared in volume 73, part 9 of the IJSEM. Int J Syst Evol Microbiol 2023; 73:6158.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

• Synonyms:

  • Name	Kind
    "Candidatus Methyloacida" Islam et al. 2008	heterotypic synonym, not pro-validly published

• Notes:
  • 🧕 Awala et al. (2023) assigned this genus to the order Methylacidiphilales Awala et al. 2023. Publication: Awala SI, Gwak JH, Kim Y, Seo C, Strazzulli A, Kim SG, Rhee SK. Methylacidiphilum caldifontis gen. nov., sp. nov., a thermoacidophilic methane-oxidizing bacterium from an acidic geothermal environment, and descriptions of the family Methylacidiphilaceae fam. nov. and order Methylacidiphilales ord. nov. Int J Syst Evol Microbiol 2023; 73:6085.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Candidatus Methylacidiphilum" Hou et al. 2008. Publication: Op den Camp HJ, Islam T, Stott MB, Harhangi HR, Hynes A, Schouten S, Jetten MS, Birkeland NK, Pol A, Dunfield PF. Environmental, genomic and taxonomic perspectives on methanotrophic Verrucomicrobia. Environ Microbiol Rep 2009; 1:293-306.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Candidatus Methylacidiphilum" Hou et al. 2008. Publication: Erikstad HA, Jensen S, Keen TJ, Birkeland NK. Differential expression of particulate methane monooxygenase genes in the verrucomicrobial methanotroph 'Methylacidiphilum kamchatkense' Kam1. Extremophiles 2012; 16:405-409.
  • 🚋 The type species of this genus has alternatively been placed in the genus "Candidatus Methyloacida" Islam et al. 2008. Publication: Islam T, Jensen S, Reigstad LJ, Larsen O, Birkeland NK. Methane oxidation at 55 degrees C and pH 2 by a thermoacidophilic bacterium belonging to the Verrucomicrobia phylum. Proc Natl Acad Sci U S A 2008; 105:300-304.
  • 🙄 This taxon name is occasionally misprinted (or affected by an OCR error) in some sources as: "Methyacidiphilum"; "Metylacidiphilum".
  • 😡 This taxon name is a homonym of "Candidatus Methylacidiphilum" Hou et al. 2008.
  • 😡 This taxon name is a homonym of Methylacidiphilum Awala et al. 2023.
  • 🎰 The BRCs most frequently used for deposits in this group are: KCTC: 1; JCM: 1.
  • 🧍 This name was subject to a Request for an Opinion. Publication: Awala SI, Li MS, Rhee SK. Request for conserving the generic name Methylacidiphilum Awala et al. 2023 over Methylacidiphilum Ratnadevi et al. 2023 to resolve the illegitimacy of Methylacidiphilum Awala et al. 2023, Methylacidiphilum caldifontis Awala et al. 2023, Methylacidiphilaceae Awala et al. 2023 and Methylacidiphilales Awala et al. 2023. Request for an Opinion. Int J Syst Evol Microbiol 2025; 75:6732.

Subdivision:

Number of child taxa with a validly published and correct name: 1
Number of child taxa with a validly published name, including synonyms: 1
Total number of child taxa: 1

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Methylacidiphilum kamchatkense Ratnadevi et al. 2023	validly published under the ICNP	correct name

Parent taxon: Methylacidiphilaceae Awala et al. 2023

Assigned by: LPSN automated production system. The following publication is only one of the sources consulted. It may or may not mention this taxon name. — Awala SI, Gwak JH, Kim Y, Seo C, Strazzulli A, Kim SG, Rhee SK. Methylacidiphilum caldifontis gen. nov., sp. nov., a thermoacidophilic methane-oxidizing bacterium from an acidic geothermal environment, and descriptions of the family Methylacidiphilaceae fam. nov. and order Methylacidiphilales ord. nov. Int J Syst Evol Microbiol 2023; 73:6085.

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Record number: 21083