	Authors	Year	Title
	Ehiro & Misaki	2005	Middle Permian ammonoids from the Kamiyasse-Imo district in the Southern Kitakami Massif, Northeast Japan. Paleontological Research, 9: 1-14, 9 fig.
	Glenister & Furnish	1988	Terminal Progenesis in Late Paleozoic Ammonoid Families. In: Wiedmann, J. & Kullmann, J. (Eds.), Cephalopods - Present and Past: 51-66, fig.1-3; Stuttgart.