Radiolaria - Spumellaria - Orosphaeridae

Full reference: K. Sugiyama. 1992. Lower and Middle Triassic radiolarians from Mt. Kinkazan, Gifu Prefecture, central Japan. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 167:1180-1223

Belongs to Polyentactinia according to K. Sugiyama 1992

Sister taxa: Polyentactinia aranea, Polyentactinia craticulata, Polyentactinia crux, Polyentactinia miopora, Polyentactinia polygonia

Type specimen: Its type locality is Mt. Kinkazan, Gifu City, P. nakatsugawaensis assemblage, which is in a Spathian basinal (siliceous) chert/shale in Japan.

Ecology: passively mobile planktonic omnivore