Pelagic Molluscs 2.0: Das norddeutsche Unter-Oligocen und seine Mollusken-Fauna, 4(1). RissoidaeLittorinidae-Turbinidae- Haliotidae-Fissurellidae-Calyptraeidae-Patellidae; (2) Gastropoda Opisthobranchiata; (3)(1) Gastropoda Polyplacophora; (2) Scaphopoda; (3) Pteropoda; (4) Cephalopoda. Abhandl. preuss. geol. L.-Anst. 10: 819-1004, pls 53-62.

Authors(s)	Koenen, A. von
Year	1892
Title	Das norddeutsche Unter-Oligocen und seine Mollusken-Fauna, 4(1). RissoidaeLittorinidae-Turbinidae- Haliotidae-Fissurellidae-Calyptraeidae-Patellidae; (2) Gastropoda Opisthobranchiata; (3)(1) Gastropoda Polyplacophora; (2) Scaphopoda; (3) Pteropoda; (4) Cephalopoda. Abhandl. preuss. geol. L.-Anst. 10: 819-1004, pls 53-62.