cavaspongiidae cavaspongiidae cavaspongiidae is a family of radiolarians in the order spumellaria. cavaspongiidae scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: retaria subphylum: radiolaria class: polycystinea order: spumellaria family: cavaspongiidaepessagno, 1973 genera cavaspongia cavidiscus dumitricaia