Evansella is a genus of Gram-positive rod-shaped bacteria in the family Bacillaceae within the order Bacillales.

[6] To clarify the taxonomic relationships within the genus, multiple phylogenetic studies have been conducted, resulting in the transfer of many species into novel genera such as Virgibacillus, Solibacillus, Brevibacillus and Ectobacillus.

[10][1] The name Evansella is chosen to celebrate the American microbiologist Dr. Alice Catherine Evans (1885-1975, US Department of Agriculture) in recognition of her contributions to the field of bacteriology.

[1] Three conserved signature indels (CSIs) have been identified through genomic analyses as exclusive for this genus in the proteins GTP pyrophosphokinase family protein, lipoprotein signal peptidase II and Clp protease ClpP.

[1] These CSIs provide a novel means to distinguish Evansella from other Bacillaceae genera in molecular terms.