sphaerisporangium sphaerisporangium sphaerisporangium is a gram-positive genus of bacteria from the family of streptosporangiaceae. sphaerisporangium rubeum scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: streptosporangiales family: streptosporangiaceae genus: sphaerisporangiumara and kudo 2007 type species sphaerisporangium melleum species s. album s. aureirubrum s. cinnabarinum s. flaviroseum s. krabiense s. melleum s. rufum s. rubeum s. siamense synonyms sphaerosporangium