The International Code of Nomenclature of Prokaryotes (ICNP) now includes the phylum category. For the purpose of the valid publication of their names under the ICNP, we consider here four phyla. Slightly modified descriptions of ‘
Abditibacteriota
’ Tahon et al. 2018 and ‘
Desulfobacterota
’ Waite et al. 2020 are provided to meet the requirements of the ICNP for phylum names.
Methanobacteriota
is proposed as a substitute for ‘
Euryarchaeota
’ Garrity and Holt 2021, while Nanobdellota is proposed to replace ‘
Nanoarchaeota
’ Huber et al. 2002, based on the genus Nanobdella Kato et al. 2022.