bacillus coahuilensis bacillus coahuilensis bacillus coahuilensis is a rod-shaped, gram-positive, motile, spore-forming bacterium. this species was isolated from water samples taken from a highly saline desert lagoon in coahuila, mexico. bacillus coahuilensis scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: bacillus species: b. coahuilensis binomial name bacillus coahuilensiscerritos et al., 2008