Locality Layer
Algeria, Saoura Valley, Béni Abbès,SW of Givetian,middle
Canada, British Columbia, Chischa River, Tuchodi Lakes Besa Fm.
Germany, Rhenish Mountains, Adorf, Martenberg terebratum Zone
Morocco, Tafilalt, Hassi Nebech A
Morocco, Tafilalt, Hassi Nebech B top