sulfurospirillum arsenophilum sulfurospirillum arsenophilum sulfurospirillum arsenophilum is a bacterium. it is notable for metabolising arsenic, hence its name. sulfurospirillum arsenophilum scientific classification domain: bacteria phylum: campylobacterota class: "campylobacteria" order: campylobacterales family: campylobacteraceae genus: sulfurospirillum species: s. arsenophilum binomial name sulfurospirillum arsenophilumstolz et al. 1999