Radiolaria - Spumellaria - Xiphostylidae

Alternative combination: Neotripocyclia harperi

Full reference: E. Pessagno, W. M. Six, and Q. Yang. 1989. The Xiphostylidae Haeckel and Parvivaccidae, n. fam, (Radiolaria) from the North American Jurassic. Micropaleontology 35(3):193-255

Belongs to Suna according to W. Kiessling 1995

Sister taxon: Suna echiodes

Type specimen: USNM 424138