Radiolaria - Nassellaria - Hsuidae

Full reference: E. A. Pessagno, Jr. and P.A. Whalen. 1982. Lower and Middle Jurassic Radiolaria (multicyrtid Nassellariina) from California, east-central Oregon and the Queen Charlotte Islands, B.C. Micropaleontology 28(2):111-169

Belongs to Hsuum according to Pessagno and Whalen 1982

Sister taxa: Hsuum acutum, Hsuum altile, Hsuum amabile, Hsuum arabicum, Hsuum arenaense, Hsuum brevicostatum, Hsuum cuestaense, Hsuum feliformis, Hsuum gratum, Hsuum lucidum, Hsuum lupheri, Hsuum matsuokai, Hsuum maxwelli, Hsuum mclaughlini, Hsuum mirabundum, Hsuum modicum, Hsuum mulleri, Hsuum optimum, Hsuum parasolense, Hsuum parvulum, Hsuum plectocostatum, Hsuum robustum, Hsuum rosebudense, Hsuum rutogense, Hsuum tamanense

Type specimen: USNM 307230

Ecology: passively mobile planktonic omnivore