In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall.
The Chloroflexia are a class of bacteria in the phylum Chloroflexota. Chloroflexia are typically filamentous, and can move about through bacterial gliding. It is named after the order Chloroflexales.
The Thermomicrobia is a group of thermophilic green non-sulfur bacteria. Based on species Thermomicrobium roseum and Sphaerobacter thermophilus, this bacteria class has the following description:
The Chlamydiota 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. All of the Chlamydiota that humans have known about for many decades are obligate intracellular bacteria; in 2020 many additional Chlamydiota were discovered in ocean-floor environments, and it is not yet known whether they all have hosts. Historically it was believed that all Chlamydiota had a peptidoglycan-free cell wall, but studies in the 2010s demonstrated a detectable presence of peptidoglycan, as well as other important proteins.
The Gemmatimonadota are a phylum of bacteria established in 2003. The phylum contains two classes Gemmatimonadetes and Longimicrobia.
Nitrospirota is a phylum of bacteria. It includes multiple genera, such as Nitrospira, the largest. The first member of this phylum, Nitrospira marina, was discovered in 1985. The second member, Nitrospira moscoviensis, was discovered in 1995.
Bacterial phyla constitute the major lineages of the domain Bacteria. While the exact definition of a bacterial phylum is debated, a popular definition is that a bacterial phylum is a monophyletic lineage of bacteria whose 16S rRNA genes share a pairwise sequence identity of ~75% or less with those of the members of other bacterial phyla.
Armatimonadota is a phylum of gram-negative bacteria.
Dehalococcoidia is a class of Chloroflexota, a phylum of Bacteria. It is also known as the DHC group.
There are several models of the Branching order of bacterial phyla, one of these was proposed in 1987 paper by Carl Woese.
Arcicella is a genus of aerobic bacteria from the family of Spirosomaceae.
Paenalcaligenes is a genus of bacteria from the family of Alcaligenaceae.
Anaerolineaceae is a family of bacteria from the order of Anaerolineales. Anaerolineaceae bacteria occur in marine sediments. There are a total of twelve genera in this family, most of which only encompass one species. All known members of the family are Gram-negative and non-motile. They also do not form bacterial spores and are either mesophilic or thermophilic obligate anaerobes. It is also known that all species in this family are chemoheterotrophs.
Bellilinea is a thermophilic bacteria genus from the family of Anaerolineaceae with one known species. Bellilinea caldifistulae has been isolated from thermophilic digester sludge from Niigata in Japan.
Leptolinea is a bacteria genus from the family of Anaerolineaceae with one known species.
Levilinea is a bacteria genus from the family of Anaerolineaceae with one known species.
Longilinea is a bacteria genus from the family of Anaerolineaceae with one known species. .
Ardenticatena is a Gram-negative, thermophilic and chemoheterotrophic genus of bacteria from the family of Ardenticatenaceae with one known species. Ardenticatena maritima has been isolated from iron-rich sediments from a coastal hydrothermal field from Kagoshima in Japan.
Nitrospinota is a bacterial phylum. Despite only few described species, members of this phylum are major nitrite-oxidizing bacteria in surface waters in oceans. By oxidation of nitrite to nitrate they are important in the process of nitrification in marine environments.
Mesobacillus is a genus of gram-positive or gram-variable, rod-shaped bacteria in the family Bacillaceae within the order Bacillales. The type species for this genus is Mesobacillus jeotgali.
