coriobacterium coriobacterium coriobacterium is a genus of actinomycetota, in the family coriobacteriaceae. coriobacterium are non-motile, gram-positive, non-sporulating rods, which inhabit the gastrointestinal tract of firebugs (pyrrhocoris apterus). up to now there is only on species of this genus known (coriobacterium glomerans) coriobacterium scientific classification domain: bacteria phylum: actinomycetota class: coriobacteriia order: coriobacteriales family: coriobacteriaceae genus: coriobacteriumhaas and könig 1988 species coriobacterium glomerans