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