Pteropoda
Suggested reading

Bé A.W.H., Gilmer A.W. 1977. A zoogeographic and taxonomic review of euthecosomatous Pteropoda. In "Oceanic Micropaleontology" (A.T.S. Ramsay, ed.), Acad. Press, London, pp. 733-808.
—Excellent review of the world-wide distribution and classification of Euthecosomata.

Lalli C.M., Gilmer R.W. 1989. Pelagic snails. The biology of holoplanktonic gastropod mollusks. Stanford Univ. Press, Stanford, pp. 1-259.
—All aspects of pelagic molluscs, including the pteropods, are covered in this manual.

van der Spoel S. 1967. Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda). J. Noorduijn and Zoon, Gorinchem, pp. 1-375.
—A major monograph on the biology, morphology, taxonomy, and distribution of Euthecosomata.

van der Spoel S. 1976. Pseudothecosomata, Gymnosomata and Heteropoda. Bohn, Scheltema and Holkema, Utrecht, pp. 1-484.
—An updated revision of these pelagic molluscs, with detailed data on identification, morphology, anatomy and distribution.

van der Spoel S., Boltovskoy D. 1981. Pteropoda. In "Atlas del Zooplancton del Atlántico Sudoccidental y métodos de trabajo con el zooplancton marino" (D. Boltovskoy, ed.), Public. Esp. Inst. Nac. Inv. Desarrollo Pesq., Mar del Plata, pp. 493-524.
—General review of the systematics and distribution of the pteropods of the Southwestern Atlantic Ocean. Includes brief remarks on biology, methods of research, history of study, etc. (in Spanish).

van der Spoel S., Newman L., Estep K.W. 1997. Pelagic molluscs of the world. World Biodiversity Database, CD-ROM Series. Expert Center for Taxonomic Identification (ETI), Amsterdam, The Netherlands, UNESCO, Paris.
—An electronic guide for the identification and distribution of the pelagic molluscs of the world.