Information based on LPSN 2021 Niallia is a genus of Gram-Positive rod-shaped bacteria in the family Bacillaceae from the order Bacillales.
Multiple studies using comparative phylogenetic analyses have been published in an attempt to clarify the evolutionary relationships between Bacillus species, resulting in the establishment of numerous novel genera such as Alkalihalobacillus, Brevibacillus, Solibacillus, Alicyclobacillus, Virgibacillus and Evansella.
[1] Members of this genus are facultatively anaerobic and found in diverse locations such as soil, sewage, food and human stool.
Niallia circulans is an important bacterium used in aquaculture, bioremediation, water treatment and enzyme production.
[11] A non-validly published species, "Bacillus tuaregi", is also found to group with other members of Niallia in phylogenetic trees as well as share the same molecular markers in the form of conserved signature indels (CSIs).