Radiolaria - Spumellaria - Xiphostylidae

Alternative combination: Tripocyclia amajacensis

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 Triactoma according to W. Kiessling 1999

Sister taxa: Triactoma blakei, Triactoma cellulosa, Triactoma frequens, Triactoma hexeris, Triactoma hidalgoensis, Triactoma jonesi, Triactoma kellumi, Triactoma mexicana, Triactoma parablakei, Triactoma paramexicana, Triactoma prolongata, Triactoma rosespitensis, Triactoma spinosa, Triactoma tenuspinea, Triactoma tithonianum

Type specimen: USNM 424150