geodermatophilus dictyosporus geodermatophilus dictyosporus geodermatophilus dictyosporus is a gram-positive and gamma-ray resistant bacterium from the genus geodermatophilus which has been isolated from soil from the westgard pass in the united states. geodermatophilus dictyosporus scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: geodermatophilales family: geodermatophilaceae genus: geodermatophilus species: g. dictyosporus binomial name geodermatophilus dictyosporusmontero-calasanz et al. 2015 type strain atcc 25080cbs 234.69ccug 62970dsm 43161 synonyms "geodermatophilus obscurus subsp. dictyosporus" luedemann 1968