SeqCode Registry
Register List https://seqco.de/r:4owxxlm8 [2026]

Register list for 7 new names including Methanomethylicus gen. nov.

Submitted by Nguyen, Huong

Phylum Methanomethylicota

Etymology
[Me.tha.no.me.thy.li.co'ta] N.L. masc. n. Methanomethylicus, referring to the type genus Methanomethylicus; -ota, ending to denote a phylum; N.L. neut. pl. n. Methanomethylicota, the Methanomethylicus phylum
Nomenclatural type
Genus Methanomethylicus
Classification
Archaea » Methanomethylicota
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren, Göker, 2023 [2] (from “Verstraetearchaeota”)
Assigned taxonomically: Vanwonterghem et al., 2016 [1]
Registry URL
https://seqco.de/i:23980

Class Methanomethylicia

Etymology
[Me.tha.no.me.thy.li'ci.a] N.L. masc. n. Methanomethylicus, referring to the type genus Methanomethylicus; -ia, ending to denote a class; N.L. neut. pl. n. Methanomethylicia, the Methanomethylicus class
Nomenclatural type
Genus Methanomethylicus
Description
Vanwonterghem et al. (2016): The description is the same as for the genus Methanomethylicus. Suff. -ia, ending to denote a class. Type order: Methanomethyliales, ord. nov.
Classification
Archaea » Methanomethylicota » Methanomethylicia
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren et al., 2020 [3] (from “Methanomethylia”)
Registry URL
https://seqco.de/i:23972

Order Methanomethylicales

Etymology
[Me.tha.no.me.thy.li.ca'les] N.L. masc. n. Methanomethylicus, referring to the type genus Methanomethylicus; -ales, ending to denote an order; N.L. fem. pl. n. Methanomethylicales, the Methanomethylicus order
Nomenclatural type
Genus Methanomethylicus
Description
The description is the same as for the genus Methanomethylicus.
Classification
Archaea » Methanomethylicota » Methanomethylicia » Methanomethylicales
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren et al., 2020 [3] (from “Methanomethyliales”)
Registry URL
https://seqco.de/i:23979

Family Methanomethylicaceae

Etymology
[Me.tha.no.me.thy.li.ca'ce.ae] N.L. masc. n. Methanomethylicus, referring to the type genus Methanomethylicus; -aceae, ending to denote a family; N.L. fem. pl. n. Methanomethylicaceae, the Methanomethylicus family
Nomenclatural type
Genus Methanomethylicus
Description
The description is the same as for the genus Methanomethylicus. Type genus: Methanomethylicus, gen. nov.
Classification
Archaea » Methanomethylicota » Methanomethylicia » Methanomethylicales » Methanomethylicaceae
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren et al., 2020 [3] (from “Methanomethyliaceae”)
Registry URL
https://seqco.de/i:23978

Genus Methanomethylicus

Etymology
[Me.tha.no.me.thy'li.cus] N.L. pref. methano-, pertaining to methane; N.L. masc. adj. methylicus, pertaining to the methyl group; N.L. masc. n. Methanomethylicus, methane producing organism growing on methyl groups
Nomenclatural type
Species Methanomethylicus mesodigestusTs
Classification
Archaea » Methanomethylicota » Methanomethylicia » Methanomethylicales » Methanomethylicaceae » Methanomethylicus
References
Effective publication: Vanwonterghem et al., 2016 [1]
Registry URL
https://seqco.de/i:23973

Species Methanomethylicus mesodigestusTs

Etymology
[me.so.di.ges'tus] Gr. masc. adj. mesos, middle; L. masc. perf. part. digestus, that has a good digestion; N.L. masc. adj. mesodigestus, referring to a mesophilic digester
Nomenclatural type
NCBI Assembly: GCA_001717005.1 Ts
Description
This organism is inferred to be capable of methylotrophic methanogenesis, is non-motile, and not cultivated, represented by near-complete population genomes V1 (type strain) and V2 obtained from anaerobic digesters.
Classification
Archaea » Methanomethylicota » Methanomethylicia » Methanomethylicales » Methanomethylicaceae » Methanomethylicus » Methanomethylicus mesodigestusTs
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren et al., 2020 [3] (from “Methanomethylicus mesodigestum”)
Registry URL
https://seqco.de/i:23974

Species Methanomethylicus oleisabuli

Etymology
[o.le.i.sa'bu.li] L. neut. n. oleum, oil; L. neut. n. sabulum, sand; N.L. gen. n. oleisabuli, of oil sand
Nomenclatural type
NCBI Assembly: GCA_001717025.1 Ts
Description
This organism is inferred to be capable of methylotrophic methanogenesis, is non-motile, and not cultivated, represented by a near-complete population genome V3 obtained from an iso-alkane degrading enrichment culture from tailings ponds.
Classification
Archaea » Methanomethylicota » Methanomethylicia » Methanomethylicales » Methanomethylicaceae » Methanomethylicus » Methanomethylicus oleisabuli
References
Effective publication: Vanwonterghem et al., 2016 [1]
Corrigendum: Oren et al., 2020 [3] (from “Methanomethylicus oleusabulum”)
Registry URL
https://seqco.de/i:23975

References

  1. Vanwonterghem et al. (2016). Methylotrophic methanogenesis discovered in the archaeal phylum Verstraetearchaeota. Nature Microbiology. DOI:10.1038/nmicrobiol.2016.170
  2. Oren, Göker (2023). Candidatus List. Lists of names of prokaryotic Candidatus phyla. International Journal of Systematic and Evolutionary Microbiology. DOI:10.1099/ijsem.0.005821
  3. Oren et al. (2020). Lists of names of prokaryotic Candidatus taxa. International Journal of Systematic and Evolutionary Microbiology. DOI:10.1099/ijsem.0.003789

Register List Certificate of Validation

On behalf of the Committee on the Systematics of Prokaryotes Described from Sequence Data (SeqCode Committee), we hereby certify that the Register List seqco.de/r:4owxxlm8 submitted by Nguyen, Huong and including 7 new names has been successfully validated.


Date of Priority: 2026-08-04 12:37 UTC
DOI: 10.57973/seqcode.r:4owxxlm8