alterococcus agarolyticus alterococcus agarolyticus alterococcus agarolyticus is a gram-negative, facultatively anaerobic, halophilic and thermophilic bacterium from the genus of alterococcus. alterococcus agarolyticus scientific classification domain: bacteria phylum: verrucomicrobiota class: opitutae order: opitutales family: opitutaceae genus: alterococcus species: a. agarolyticus binomial name alterococcus agarolyticusshieh and jean 1999 type strain adt3