Bacterial Phyla

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

Pseudomonadota (synonym "Proteobacteria") is a major phylum of gram-negative bacteria.

The Bacillota (synonym "Firmicutes") are a phylum of bacteria, most of which have Gram-positive cell wall structure.

The Actinomycetota (previously known as "Actinobacteria") are a diverse phylum of Gram-positive bacteria with high guanine-cytosine content (GC content or G+C content).

Cyanobacteria ( sy-AN-oh-bak-TEER-ee-ə) are a group of autotrophic gram-negative bacteria of the phylum Cyanobacteriota that can obtain biological energy via oxygenic photosynthesis.

The phylum Bacteroidota (synonym Bacteroidetes) is composed of three large classes of Gram-negative, nonsporeforming, anaerobic or aerobic, and rod-shaped bacteria that are widely distributed in the environment, including in soil, sediments, and sea water, as well as in the guts and on the skin of animals.

The green sulfur bacteria are a phylum, Chlorobiota, of obligately anaerobic photoautotrophic bacteria that metabolize sulfur.

Chloroflexi is a temporary taxon name for:

Deinococcota (synonym, "Deinococcus-Thermus") is a phylum of bacteria with a single class, Deinococci (from Ancient Greek δεινός (deinós), meaning "terrible", and κόκκος (kókkos), meaning "berry"), that are highly resistant to environmental hazards, also known as extremophiles.

A spirochaete () or spirochete is a member of the phylum Spirochaetota (also called Spirochaetes ), which contains distinctive diderm (double-membrane) Gram-negative bacteria, most of which have long, helically coiled (corkscrew-shaped or spiraled, hence the name) cells.

Verrucomicrobia may refer to:

The Planctomycetota are a phylum of widely distributed bacteria, occurring in both aquatic and terrestrial habitats.

The Aquificota phylum is a diverse collection of bacteria that live in harsh environmental settings.

The Thermotogae is a class of kingdom Thermotogati and domain Bacteria.

The Chlamydiota (synonym Chlamydiae) are a bacterial phylum and class whose members are remarkably diverse, including pathogens of humans and animals, symbionts of ubiquitous protozoa, and marine sediment forms not yet well understood.

Acidobacteriota is a phylum of Gram-negative bacteria.

The Nitrospirota are a phylum of bacteria.

The Gemmatimonadota are a phylum of bacteria established in 2003.

The Synergistota is a phylum of anaerobic bacteria that show Gram-negative staining and have rod/vibrioid cell shape.

Elusimicrobium minutum is an ultramicrobacterium and first accepted member to be cultured of a major bacterial lineage previously known only as candidate phylum Termite Gut 1 (TG1), which has accordingly been renamed phylum Elusimicrobiota.

Fibrobacterota is a bacterial phylum that includes cellulose-degrading bacteria associated with the digestive tracts of mammals, including ruminants.

The Deferribacteraceae are a family of gram-negative bacteria which make energy by anaerobic respiration.

Dictyoglomus is a genus of bacterium, given its own phylum, called the Dictyoglomerota.