Methanomicrobiales

Methanomicrobiales
Scientific classification
Domain:	Archaea
Kingdom:	Methanobacteriati
Phylum:	Methanobacteriota
Class:	"Methanomicrobia"
Order:	Methanomicrobiales; Balch and Wolfe 1981
Families
	Methanocalculaceae; Methanocorpusculaceae; Methanoculleaceae; Methanofollaceae; Methanospirillaceae; Methanomicrobiaceae; Methanoregulaceae; Methanosphaerulaceae;

Methanomicrobiales is an order of archaeans in the phylum Methanobacteriota. Methanomicrobiales are strictly carbon dioxide reducing methanogens, using hydrogen or formate as the reducing agent. As seen from the phylogenetic tree based on 'The All-Species Living Tree' Project the family Methanomicrobiaceae is highly polyphyletic within the Methanomicrobiales.

Phylogeny

16S rRNA based LTP_07_2026

53 marker proteins based GTDB 11-RS232

Methanofollaceae Chuvochina et al. 2024

	Methanocorpusculaceae Zellner et al. 1989

	Methanocalculaceae Zhilina et al. 2014

	Methanospirillaceae Boone, Whitman & Koga 2002

	Methanoregulaceae Sakai et al. 2012 (incl. Methanosphaerulaceae)

	Methanomicrobiaceae Balch & Wolfe 1981

	Methanoculleaceae Chuvochina et al. 2024

Methanofollaceae

Methanocorpusculaceae (incl. Methanocalculaceae)

Methanospirillaceae (incl. Methanosphaerulaceae, Methanoregulaceae)

1 2 C.L. Schoch. "Methanomicrobiales". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2026-08-01.
↑ D.R. Boone; et al. (2001). Bergey's Manual of Systematic Bacteriology (2nd ed.). New York: Springer.
↑ Methanomicrobiales in LPSN; Freese, H. M.; Meier-Kolthoff, J. P.; Sardà Carbasse, J.; Afolayan, A. O.; Göker, M. (2026). "TYGS and LPSN in 2025: a Global Core Biodata Resource for genome-based classification and nomenclature of prokaryotes within DSMZ Digital Diversity". Nucleic Acids Research. 54 (D1): D884–D891. doi:10.1093/nar/gkaf1110.
↑ "The LTPlus". The All-Species Living Tree Project. Retrieved 1 August 2026.
↑ "LTP_all tree in newick format". The All-Species Living Tree Project. Retrieved 1 August 2026.
↑ Rossello-Mora, Ramon; Viver, Tomeu; Palmer-Rodríguez, Pere; Westram, Ralf; Bustos-Caparros, Esteban; Gago, Joan Francisco; Gonzalez-Mendez, Jaime; Llabrés, Mercè; Ludwig, Wolfgang; Amann, Rudolf (22 April 2026). "A pipeline for improved 16S rRNA gene-based phylogeny and diversity analyses of Bacteria and Archaea". Nature Portfolio. doi:10.21203/rs.3.rs-9370187/v1.
↑ "GTDB release 11-RS232". Genome Taxonomy Database. Retrieved 1 May 2026.
↑ "ar53_r232.sp_label". Genome Taxonomy Database. Retrieved 1 May 2026.
↑ "Taxon History". Genome Taxonomy Database. Retrieved 1 May 2026.

Garrity GM; Bell JA; Lilburn TG (2004). "Taxonomic Outline of the Prokaryotes". Bergey's Manual of Systematic Bacteriology, release 4.0 (2nd ed.). New York: Springer Verlag. doi:10.1007/bergeysoutline200310.