Original Description Amphipyndacids with transverse, ring-like septum as in Amphipyndax. Collar structures (apical and vertical bars) depend from this septum into thoracic cavity where the primary and secondary lateral bars join the thoracic wall (figure 7). Translation: Size: Etymology: From the Greek amphi = double, and pternis = bottom of a dish. Extra details from original publication
Editors' Notes This genus differs from Amphipyndax in having the collar structures elongated in the thoracic cavity rather than constricted and reuced to form a small chamber. Previously described species belonging to this genus include: Phormocampe alamedaensis Campbell and Clark, 1944b = ? Stichomitra alamedaensis (Campbell and Clark) Foreman, 1968, and Lithocampe ? clava Ehrenberg, 1873.
Stratigraphic range:Late Cretaceous.
Foreman, H. P. (1973b). Radiolaria of Leg 10 with systematics and ranges for the families Amphipyndacidae, Artostrobiidae, and Theoperidae. Initial Reports of the Deep Sea Drilling Project. 10: 407-474. gsO
Amphipternis compiled by the radiolaria@mikrotax project teamviewed: 6-12-2022