nautilia nitratireducens nautilia nitratireducens nautilia nitratireducens is a gram-negative thermophilic, chemosynthetic, anaerobic bacterium from the genus of nautilia which has been isolated from a hydrothermal vent from the east pacific rise. nautilia nitratireducens scientific classification domain: bacteria phylum: campylobacterota class: "nautiliia" order: nautiliales family: nautiliaceae genus: nautilia species: n. nitratireducens binomial name nautilia nitratireducenspérez-rodríguez et al. 2010 type strain dsm 22087, epr-mb1, jcm 15746, mb-1 synonyms nautilia hydrogenophila