cenellipsis cenellipsis cenellipsis is a genus of radiolarians in the order spumellaria. the genus is extant but there are also fossil species. cenellipsis illustration from report on the radiolaria collected by h.m.s. challenger during the years 1873-1876.part iii. plate 39. ellipsida, druppulida, artiscida et cyphinida. fig. 1. cenellipsis faceta, n. sp. (vel ellipsis faceta), ×300 fig. 2. cenellipsis infundibulum, n. sp. (vel ellipsis infundibulum), ×300 scientific classification domain: eukaryota (unranked): sar (unranked): rhizaria phylum: retaria subphylum: radiolaria class: polycystina order: spumellaria family: incertae sedis genus: cenellipsishaeckel, 1887a species several, including: cenellipsis elegans borissenko, 1958 cenellipsis faceta (type) cenellipsis heterophoris campbell & clark, 1944 cenellipsis infundibulum synonyms ellipsis haeckel, 1887 cenellipsis rüst, 1885b, p. 286 is a nomen nudum (no description).