Locality	Layer
	China, Guizhou, Kuashan, Shuichengxian	Visean
	Iran, Central Iran, Anarak, close Kuh-e-Lakh, 22 km SW of A.	Beyrichoceras Stage,undiffer.;sample 141
	Morocco, Tafilalt, Dar Kaoua, 12 km S of	early U.Viséan, undifferentiated
	Morocco, Tafilalt	Mougui Ayoun Ridge north slope
	Morocco, Tafilalt, Mougui Ayoun Ridge north slope	base of the Zrigat Fm or lower Mougui Ayoun Fm
	Russian Federation, Subpolar Urals, Komi, Betyu River	Betyu River
	Russian Federation, Subpolar Urals, Komi, Betyu River, Betyu River	Upper Visean
	Spain, Southwest Spain, Los Santos de Maimona, La Alameda 1	Beyrichoceras Genozone
	USA, Utah, Juab Co., Granite Mountain South; bed 25	sample 05UTJU-12
	USA, Utah, Juab Co., Granite Mountain South; bed 25	sample 94UTJU-4