Radiolaria - Spumellaria - Angulobracchiidae

Full reference: E. Carter. 1993. Biochronology and paleontology of uppermost Triassic (Rhaetian) radiolarians, Queen Charlotte Islands, British Columbia, Canada. Memoires de Geologie 11:1-175

Belongs to Bistarkum according to E. Carter 1993

Sister taxa: Bistarkum bifurcum, Bistarkum brevilatum, Bistarkum coriniforme, Bistarkum martiali, Bistarkum phantomense, Bistarkum rhaeticum, Bistarkum rigidium, Bistarkum saginatum

Type specimen: Its type locality is 89-CNA-SKUD-13 Kunga Island, which is in a Rhaetian basinal (siliciclastic) limestone/siltstone in the Sandilands Formation of Canada

Ecology: passively mobile planktonic omnivore