quadrisphaera quadrisphaera quadrisphaera is a gram-positive genus of bacteria from the family of kineosporiaceae. quadrisphaera scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: kineosporiales family: kineosporiaceae genus: quadrisphaeramaszenan et al. 2005 type species quadrisphaera granulorummaszenan et al. 2005 species q. granulorum maszenan et al. 2005 q. oryzae muangham et al. 2020