ilyobacter insuetus ilyobacter insuetus ilyobacter insuetus is a mesophilic and anaerobic bacterium from the genus of ilyobacter which has been isolated from marine anoxic sediments from venice in italy. ilyobacter insuetus scientific classification domain: bacteria phylum: fusobacteriota class: fusobacteriia subclass: fusobacteriales order: fusobacteriaceae genus: ilyobacter species: i. insuetus binomial name ilyobacter insuetusbrune et al. 2002 type strain atcc baa-291, dsm 6831, strain venchi2