eubacterium eubacterium eubacterium is a genus of gram-positive bacteria in the family eubacteriaceae. these bacteria are characterised by a rigid cell wall. they may either be motile or nonmotile. if motile, they have a flagellum. a typical flagellum consists of a basal body, filament, and hook. the long filament is the organ which helps eubacteria move. this article is about the genus eubacterium. for eubacteria as opposed to archaea (archaebacteria), see eubacteria. eubacterium scientific classification domain: bacteria phylum: bacillota class: clostridia order: clostridiales family: eubacteriaceae genus: eubacteriumprévot, 1938 type species eubacterium foedans(klein 1908) prévot 1938 species eubacterium acidaminophilum eubacterium aggregans eubacterium angustum eubacterium barkeri eubacterium brachy eubacterium budayi eubacterium callanderi eubacterium cellulosolvens eubacterium combesii eubacterium coprostanoligenes eubacterium dolichum eubacterium eligens eubacterium hallii eubacterium infirmum eubacterium limosum eubacterium minutum eubacterium multiforme eubacterium nitritogenes eubacterium nodatum eubacterium oxidoreducens eubacterium plexicaudatum eubacterium pyruvativorans eubacterium ramulus eubacterium rectale eubacterium ruminantium eubacterium saphenum eubacterium siraeum eubacterium sulci eubacterium tarantellae eubacterium tenue eubacterium tortuosum eubacterium uniforme eubacterium ventriosum eubacterium xylanophilum eubacterium yurii gram-positive bacteria have a thick proteoglycan layer and take up violet gram stain (whereas gram-negative bacteria have a thinner proteoglycan layer which is surrounded by a layer of immune response-inducing lipopolysaccharide, and do not take up gram stain).