cyrtopera cyrtopera cyrtopera is a genus of radiolarians in the family theoperidae. cyrtopera scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: retaria subphylum: radiolaria class: polycystinea order: nassellaria family: theoperidae genus: cyrtopera species cyrtopera aglaolampa takahashi, 1991 cyrtopera laguncula