Pelagic Molluscs 2.0: The shell of Clio pyramidata Linnaeus, 1767 forma lanceolata (Lesueur, 1813) and forma convexa (Boas, 1886)(Gastropoda, Pteropoda). Vidensk. Medd. Dansk. Natur. Foren. 132: 95-114.

Authors(s)	Spoel, S. van der
Year	1969b
Title	The shell of Clio pyramidata Linnaeus, 1767 forma lanceolata (Lesueur, 1813) and forma convexa (Boas, 1886)(Gastropoda, Pteropoda). Vidensk. Medd. Dansk. Natur. Foren. 132: 95-114.