|Daughter taxa (time control age-window is: 0-800Ma)|
neptune records: 6
neptune records: 18
Catalog entries: Amphipternis
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).
Remarks on original description: 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.
Last occurrence (top): at top of Chattian Stage (100% up, 23Ma, in Aquitanian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Amphipternis compiled by the radiolaria@mikrotax project team viewed: 7-2-2023
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=203074 Go to Archive.is to create a permanent copy of this page - citation notes