nautilia lithotrophica nautilia lithotrophica nautilia lithotrophica is a thermophilic sulfur-reducing epsilon-proteobacterium isolated from a deep-sea hydrothermal vent. it is strictly anaerobic, with type strain 525t (= dsm 13520t). nautilia lithotrophica scientific classification domain: bacteria phylum: campylobacterota class: "nautiliia" order: nautiliales family: nautiliaceae genus: nautilia species: n. lithotrophica binomial name nautilia lithotrophicamiroshnichenko et al. 2002