Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime. They are aerobic, free-living soil microbes that play an important role in the nitrogen cycle in nature, binding atmospheric nitrogen, which is inaccessible to plants, and releasing it in the form of ammonium ions into the soil. In addition to being a model organism for studying diazotrophs, it is used by humans for the production of biofertilizers, food additives, and some biopolymers. The first representative of the genus, Azotobacter chroococcum, was discovered and described in 1901 by Dutch microbiologist and botanist Martinus Beijerinck. Azotobacter species are Gram-negative bacteria found in neutral and alkaline soils, in water, and in association with some plants.
The Brevundimonas are a genus of bacteria. They are Gram-negative, non-fermenting, aerobic bacilli. The Brevundimonas species are ubiquitous in the environment but are rarely isolated from clinical samples., although numbers are increasing. Two species of Brevundimonas originally classified under the genus Pseudomonas have been re-classified by Seger et al. as Brevundimonas vesicularis and Brevundimonas diminuta.
Macrococcus is a genus of Gram-positive cocci belonging to the family Staphylococcaceae. The genus was created in 1998.
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of a similar or lower rank, making the parent unit paraphyletic. That happens when rapid evolution makes a new species appear so radically different from the ancestral group that it is not (initially) recognised as belonging to the parent phylogenetic group, which is left as an evolutionary grade.
Bacterial taxonomy is subfield of taxonomy devoted to the classification of bacteria specimens into taxonomic ranks.
Acetitomaculum is a genus in the phylum Bacillota (Bacteria). The single species is an acetogenic bacteria from the bovine rumen.
Achromatium is a genus in the phylum Pseudomonadota (Bacteria).
Thermoanaerobacter is a genus in the phylum Bacillota (Bacteria). Members of this genus are thermophilic and anaerobic, several of them were previously described as Clostridium species and members of the now obsolete genera Acetogenium and Thermobacteroides
Acidiphilium is a genus in the phylum Pseudomonadota (Bacteria). As the name suggests, this comprises a nutritionally diverse genus of bacteria adapted to life in extremely acidic conditions, and often exhibiting FeIII reduction.
Acrocarpospora is a genus in the phylum Actinomycetota (Bacteria). The major respiratory quinone is menaquinone MK-9(H ) and use madurose, an actinomycete whole-cell sugar.
Actinocorallia is a genus in the phylum Actinomycetota (Bacteria).
Actinospica is a genus in the phylum Actinomycetota (Bacteria).
Actinosynnema is a genus in the phylum Actinomycetota (Bacteria).
Adhaeribacter is a genus in the phylum Bacteroidota (Bacteria).
Dendrosporobacter is a genus in the phylum Bacillota (Bacteria). Members of the class Negativicutes, stain gram negative, despite being firmicutes
Algibacter is a genus in the phylum Bacteroidota (Bacteria).
Alicycliphilus is a genus in the phylum Pseudomonadota (Bacteria).
Alkalibacillus is a genus in the phylum Bacillota (Bacteria).
Alkalimonas is a genus in the phylum Pseudomonadota (Bacteria).
Azotobacter salinestris is a Gram-negative, nitrogen-fixing bacterium; its specific name, salinestris, comes from the Latin words salinus meaning saline and estris which means "living in". It can be found living in soil or marine habitats as single cells or in chains of six to eight cells. This organism is motile at younger stages, but loses its flagella at older stages. This species is known for its potential use in bioremediation.
