allobacillus allobacillus allobacillus is a gram-positive and aerobic genus of bacteria from the family of bacillaceae with one known species (allobacillus halotolerans). allobacillus halotolerans has been isolated from shrimp paste. allobacillus scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: bacillaceae genus: allobacillussheu et al. 2011 species a. halotolerans