corynebacterium xerosis corynebacterium xerosis corynebacterium xerosis is a species of bacteria in the genus corynebacterium. corynebacterium xerosis gram stain of corynebacterium xerosis scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: corynebacteriaceae genus: corynebacterium species: c. xerosis binomial name corynebacterium xerosis(lehmann and neumann 1896) lehmann and neumann 1899 (approved lists 1980) appearance of c. xerosis colonies on blood agar