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Adams, A. and Adams, A., 1858. The genera of recent Mollusca. J. v. Voorst, London vol. 2: 1-68, vol. 3, pls. 56-136.

Bleeker, J. and Spoel, S. van der, 1988. Diacria piccola and Diacria maculata: two new pteropod mollusc species from the Atlantic and Pacific oceans. Proc. biol. Soc. Wash. 101(1): 60-66, 11 figs.

Chen, C. and Bé, A. W. H., 1964b. Seasonal distributions of euthecosomatous pteropods in the surface waters of five stations in the western North Atlantic. Bull. Mar. Sci. Gulf Caribb. 14 (2): 185-220.

Orbigny, A. d', 1836-1846. Voyage dans l'Amérique méridionale (le Brésil, la république orientale de l'Uruguay, la république Argentine, la Patagonie, la république du Chili, la république de Bolivia, la république du Pérou), exécuté pendant les années 1826, 1827, 1828, 1829, 1830, 1831, 1832 et 1833, 5(3). Mollusques. Paris (Bertrand).

1-48 are from 1835.

49-184 are from 1836.

185-376 are from 1837.

377-408 are from 1840.

409-488 are from 1841.

489-758 are from 1846.

atlas 20 pls is from 1846.

Dupont, L., 1979. Note on variation in Diacria Gray, 1847, with descriptions of a species new to science, Diacria rampali nov. spec., and a forma new to science, Diacria trispinosa forma atlantica nov. forma. Malacologia 18: 37-52, 3 tabs, 10 figs.

Gardner, N. W., 1979. Sea butterflies. Poirieria 10 (1): 13-20.

Grecchi, G., 1975a. Pteropoda fossili a Castell'Arquato. Conchiglie 11(11-12): 225-232, 1 pl.

Hilgersom, P. and Spoel, S. van der, 1987. East-West variation in Diacria off Northwest Africa. Malac. Rev. 20: 97-104.

Newman, L. J., 1990. Holoplanktonic molluscs (Gastropoda; Thecosomata, Gymnosomata, and Heteropoda) from the waters of Australia and Papua New Guinea: their taxonomy, distribution and biology. PhD Thesis Univ. Qld. Australia. 208 pp.

Pafort-van Iersel, G. J. S., 1982. Variation in Diacria trispinosa (de Blainville, 1821) and Clio pyramidata Linnaeus, 1767 (Pteropoda, Mollusca) of the Amsterdam Mid North Atlantic Plankton Expedition 1980. Beaufortia 32(6): 97-115, 6 tabs, 8 figs, 1 pl.

Rampal, J., 1975. Les thécosomes (mollusques pélagiques). Systématique et évolution écologie et biogéographie méditerranéennes. Aix-Marseille (Thesis Univ. Provence CNRS AO 11932): 1-485, 15 tabs, 99 figs.

Schalk, P. H., 1990. Spatial and seasonal variation in pteropods (Mollusca) of Indo-malayan waters related to watermass distribution. Mar. Biol. 105: 59-71.

Spoel, S. van der and Boltovskoy, D., 1981. Pteropoda. In: Boltovskoy, D. (ed.). Atlas del zooplancton del Atlantico Sudoccidental. Publ. INIDEP Argentina: 493-512.

Spoel, S. van der and Heyman, R. P., 1983. A comparative atlas of zooplankton. Biological patterns in the oceans. Bunge, Utrecht; Springer Verl., Berlin: 1-186.

Spoel, S. van der, Boltovskoy, D. and Jankivich, S. S., 1981. Classification y distribucion. In: Boltovskoy, D. (ed.). Atlas del zooplancton del Atlantico Sudoccidental. Publ. INIDEP Argentina: 512-524.

Spoel, S. van der, 1967. Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda). J. Noorduyn and Zn, Gorinchem, 375 pp.

Summary (in Dutch also published separately)

Spoel, S. van der, 1976c. Pseudothecosomata, Gymnosomata and Heteropoda. Bohn, Scheltema & Holkema, Utrecht. 484 pp. 246 figs.

Spoel, S. van der, 1981a. Descripcion de los conchas embrionarias de Cavoliniidae. In: Boltovskoy, D. (ed.). Atlas del zooplancton del Atlantico Sudoccidental. Publ. INIDEP Argentina: 525-531.

Spoel, S. van der, 1982b. Intermediates between Diacria trispinosa and D. rampali (Mollusca, Pteropoda). Basteria 46(5/6): 121-123.

Vatova, A., 1974. Sui molluschi di alcuni saggi di fondo prelevati alle soglie del Mar Jonio. Conchiglie 10(5-6): 93-112, 3 pls.

Vayssiére, A., 1915a. Mollusques euptéropodes (ptéropodes thécosomes) provenant des campagnes des yachts Hirondelle et Princesse-Alice (1885-1913). Résul. Camp. Scient. accompl. yacht par Albert Ier, prince souverain de Monaco 47: 1-226, 14 pls.

Velásquez, T. L. E. and Lozano, B. F., 1987. Algunos pteropodos euthecosomata (Mollusca: Opisthobranchia) de la Bahia de gaira, Santa Marta (Caribe Colombiano). An. Inst. Inv. Punta de Betín 17: 81-85.

Diacria rampali