clathrocyclas clathrocyclas clathrocyclas is a genus of radiolarians in the family theoperidae. clathrocyclas illustration from report on the radiolaria collected by h.m.s. challenger during the years 1873-1876. part iii. plate 59. tripocyrtida, podocyrtida et phormocyrtida. fig. 5. clathrocyclas cassiopejæ, n. sp., × 400 fig. 6. clathrocyclas alcmenæ, n. sp., ×400 fig. 7. clathrocyclas latonæ, n. sp., ×400 (apical view) fig. 9. clathrocyclas ionis, n. sp., ×400 fig. 11. clathrocyclas europæ, n. sp., ×400 (apical view of the shell, after removal of the cephalis) fig. 12. clathrocyclas europæ, n. sp., ×400 (central capsule, seen from above, with the quadrilobate nucleus) fig. 13. clathrocyclas danaës, n. sp., ×300 (vertical section through the cephalis and the quadrilobate central capsule, with the quadrilobate nucleus) fig. 14. clathrocyclas danaës, n. sp., ×300 (apical view of the shell) scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: retaria subphylum: radiolaria class: polycystina order: nassellaria family: theoperidae genus: clathrocyclashaeckel, 1881 species several, including: clathrocyclas cassiopeiae haeckel, 1887 clathrocyclas elegans (lipman, 1950) kozlova, 1990