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Register List [2024]

Omnitrophota phy. nov.

Submitted by Palmer, Marike

Phylum Omnitrophota

['ta] N.L. masc. n. Omnitrophus, referring to the type genus Omnitrophus; -ota, ending to denote a phylum; N.L. neut. pl. n. Omnitrophota, the Omnitrophus phylum
Nomenclatural type
Genus Omnitrophus
The properties of the phylum are as given by Rinke et al. (2013) with the following modifications. Members of this phylum typically have small cells, with cells of approximately 0.2 μm identified in several classes. However, metagenomic DNA containing members of the Omnitrophota is also frequently recovered from larger cell fractions after serial filtration and larger cells have been observed in some members of the phylum. Members typically have reduced genomes, although complete biosynthetic pathways are typically encoded, with genomes ranging between 1 and 3 Mb. Genome data suggest syntrophic or host-independent acetogenic pathways, or alternatively, diverse respiratory pathways for their predicted energy metabolism. Parasitism- and predator-related genes are common in the phylum, including tight-adherence complexes, type 2 or 3 F-type ATPases, ADP/ATP translocases, and putative adhesive megaproteins, multiple copies of the Type 4a pilus complex is encoded by all members of the phylum. This phylum is closely related or part of the PVC superphylum, with a close evolutionary relationship to the Ratteibacteria. The nomenclatural type of the phylum is the genus Omnitrophus.
Bacteria » Omnitrophota
Effective publication: Rinke et al., 2013 [1]
Corrigendum: Seymour et al., 2023 [2] (from “Omnitrophica”)


  1. Rinke et al. (2013). Insights into the phylogeny and coding potential of microbial dark matter. Nature. DOI:10.1038/nature12352
  2. Seymour et al. (2023). Hyperactive nanobacteria with host-dependent traits pervade Omnitrophota. Nature Microbiology. DOI:10.1038/s41564-022-01319-1

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 submitted by Palmer, Marike and including 1 new name has been successfully validated.

Date of Priority: 2024-03-14 01:44 UTC
DOI: 10.57973/seqcode.r:6keafw8d