A.ci.do.bac.te.ri.a'les. N.L. neut. n. Acidobacterium type genus of the order; -ales ending to denote an order; N.L. fem. pl. n. Acidobacteriales the order of Acidobacterium.

Acidobacteria / Acidobacteriia / “Acidobacteriales”

The order “Acidobacteriales,” being the first described order in the class “Acidobacteriia,” was circumscribed on the basis of phylogenetic analysis of 16S rRNA gene sequences. The name, published in 2002, was placed on the list of nomina rejicienda but was proposed again as ord. nov. by Thrash and Coates in 2011. At present, the order contains a single family, the Acidobacteriaceae. Members of the order are Gram-negative, non-spore-forming, acidophilic or acidotolerant, mesophilic and psychrotolerant, chemoheterotrophic bacteria, which utilize various sugars and polysaccharides, possess a number of hydrolytic capabilities, and are particularly abundant in acidic soils, peatlands, and iron-rich environments.