Validation of the names Cyanobacterium and Cyanobacterium stanieri, and proposal of Cyanobacteriota phyl. nov.

Abstract

The decision by the International Committee on Systematics of Prokaryotes (ICSP) to place the rank of phylum under the rules of the International Code of Nomenclature of Prokaryotes (ICNP), with phylum names ending in –ota based on the name of a type genus, enables the valid publication of the phylum name Cyanobacteriota with Cyanobacterium as the type genus. The names Cyanobacterium and its type species Cyanobacterium stanieri were effectively published in 1983 by Rippka and Cohen-Bazire, but the names were not validly published under the rules of the ICNP (then named the International Code of Nomenclature of Bacteria) or the rules of the ICN (International Code of Nomenclature for algae, fungi, and plants, then named the International Code of Botanical Nomenclature). We here propose the names Cyanobacterium gen. nov and Cyanobacterium stanieri sp. nov. for valid publication under the provisions of the ICN. Upon validation these names are also validly published under the ICNP according to General Consideration 5 and Rule 30. We also propose the phylum name Cyanobacteriota phyl. nov. under the rules of the ICNP.

An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis

“…The cell shape of Geminobacterium and Geminocystis is spherical, Cyanobacterium is shortly oval or rod‐like (Oren et al. 2022), Picosynechococcus is stretched oval (Komárek et al. 2020).…”

“…A group consisting of cyanobacteria with variable cell shape and thylakoid architecture (Tuji et al 2021). The cell shape of Geminobacterium and Geminocystis is spherical, Cyanobacterium is shortly oval or rod-like (Oren et al 2022), Picosynechococcus is stretched oval (Kom arek et al 2020). Prolonged cylindrical cells are connected in short pseudofilaments in Annamia (Lien et al 2013).…”

Valid publication of names of two domains and seven kingdoms of prokaryotes

“…Their analysis also showed an early branching and an isolated position, respectively, of the phyla know known as Aquificota , Fusobacteriota and Thermotogota . All other bacterial phyla considered in the study were included in a group called ‘ Hydrobacteria ’ [30]; the validly published names of these phyla are now Bacteroidota , Chlamydiota , Chlorobiota , Desulfobacterota , Myxococcota , Planctomycetota , Pseudomonadota and Spirochaetota [3–7]. This makes ‘ Hydrobacteria ’ and ‘ Terrabacteria ’ largely, but not entirely [47], equivalent to Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980) and Firmicutes corrig.…”

“…The 2022 revision of the International Code of Nomenclature of Prokaryotes, or ICNP [1], lists the phylum category together with the other categories accepted in prokaryotic nomenclature, based on recent emendations [2]. The inclusion of this category led to the valid publication of 42 phylum names [3, 4], which was followed by the valid publication of Cyanobacteriota in 2022 [5, 6] and of four additional phylum names in 2023 [7]. The phylum name Microcaldota was recently proposed [8] and is included in Validation List No.…”

Valid publication of four additional phylum names

“…The 2022 revision of the International Code of Nomenclature of Prokaryotes, or ICNP [1], lists the phylum category along with the other categories accepted in prokaryotic nomenclature, based on recent emendations [2]. The inclusion of this category led to the valid publication of 42 phylum names [3,4], which was followed by the proposal of Cyanobacteriota in 2022 [5,6].…”