corynebacterium minutissimum corynebacterium minutissimum corynebacterium minutissimum is a species of corynebacterium associated with erythrasma, a type of skin rash. it can be distinguished from similar-appearing rashes by exposing the area to the light of a wood's lamp; c. minutissimum produces porphyrins that fluoresce coral-red. corynebacterium minutissimum scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: corynebacteriaceae genus: corynebacterium species: c. minutissimum binomial name corynebacterium minutissimum(ex sarkany et al. 1962) collins and jones 1983