solobacterium solobacterium solobacterium is a gram-positive, obligate anaerobic genus from the family of erysipelotrichidae, with one known species (solobacterium moorei). this genus has been found to be part of the salivary microbiome. solobacterium scientific classification domain: bacteria phylum: bacillota class: erysipelotrichia order: erysipelotrichales family: erysipelotrichidae genus: solobacteriumkageyama and benno 2000 type species solobacterium moorei species s. moorei