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Abbott, R. T., 1974. (2 ed.). American seashells. New York, Cincinnati, Toronto, London, Melbourne (van Nostrand Reinhold Co.): 1-663, 6405 figs.

Adams, H. and Adams, A., 1853-1858. The genera of recent Mollusca, arranged according to their organization, 1-2. London (van Voorst): 1-256, pls 1-32, 1853; 257-484, pls 33-60, 1854 (1); 1-92, pls 61-72, 1854; 93-284, pls 73-96, 1855; 285-412, pls 97-112, 1856; 413-540, pls 113-128, 1857; 541-661, pls 129-138, 1858 (2).

Almogi-Labin, A. and Reiss, Z., 1977a. Quaternary pteropods from Israel, 1. Holocene and Pleistocene pteropods from the Mediterranean continental shelf and slope of Israel; 2. Pteropods from Recent sediments in the Gulf of Elat. Rev. Españ. Micropaleont. 9(1): 5-48, 9 figs, 10 pls.

Almogi-Labin, A., Hemleben, C. and Deuser, W. G., 1988. Seasonal variation in the flux of euthecosomatous pteropods collected in a deep sediment trap in the Sargasso Sea. Deep-Sea Res., 35(3): 441-464, 4 tabs, 22 figs.

Almogi-Labin, A., 1975. Pleistocene and holocene pteropods from the eastern Mediterranean and the Gulf of Elat. 4th Rap. H. Steinitz Mar. biol. Lab. Elat: 14-15 (mimiogr.).

Almogi-Labin, A., 1982. Stratigraphic and paleoceanographic significance of Late Quaternary pteropods from deep-sea cores in the Gulf of Aqaba (Elat) and northernmost Red Sea. Marine Micropal. 7(1): 53-72.

Aron, W., 1960. Animals in the eastern North Pacific and its relationship to physical and chemical conditions. Univ. Wash. Dep. oceanogr. Tech Rep. 63: 65-154 .

Barash, A. and Danin, Z., 1971a. Opisthobranchia (Mollusca) from the Mediterranean waters of Israel. Israel J. Zool. 20 (First Ann. Symp. Israel Malac. Soc.): 151-200, 3 tabs, 3 pls, 2 maps.

Bé, A. W. H. and Gilmer, A. W., 1977. A zoogeographic and taxonomic review of euthecosomatous Pteropoda. In: A. T. S., Ramsay (ed). Oceanic Micropalaeontology I. Acad. Press London: 733-808.

Bellini, R., 1905b. Les ptéropodes des terrains tertiaires en quaternaires d'Italie. Ann. Soc. r. zool. malac. Belgique 40: 23-45, figs 9-47.

Benoit, L., 1843. Ricerche malacologiche. Messina (Capra). Farfalletta. Opera periodica Scientifica Letteraria Artistica, Dispensa XI e XVI. Nuova Serie: 3-12, 2 pls.

Biekart, J. W., 1989. Euthecosomatous pteropods as paleohydrological and paleoecological indicators in a Tyrrhenian deep-sea core. Palaeogeogr. Palaeoclim. Palaeoecol. 71: 205-224, 2 tabs, 6 figs, 2 pls.

Boas, J. E. V., 1886a. Bidrag til Pteropodernes. Morfologi of Systematik samt til Kundskaben om deres geografiske Udbredelse- Spolia Atlantica- Vidensk. Selsk. Skr. (6 Raekke) naturv. math. IV (1): 1-231.

Boltovskoy, D., 1973. Los eutecosomados del Mar Argentino y adyacencias (Mollusca, Pteropoda). Physis (Asoc. Argent. Cienc. Natur.) (A)32(85): 395-411, 1 tab., 1 text-fig., 18 figs (on 2 pls).

Bonnevie, K., 1913 (reprinted 1933). Pteropoda from the Michael Sars North-Atlantic Deep-Sea expedition. Rep. Sci. Res. 'Michael Sars' North Atl. Deep-Sea exp. 3(1): 1-69, 4 tabs, 58 figs, 9 pls.

Buccheri, G., 1984. Pteropods as climatic indicators in Quaternary sequences: a Lower-Middle Pleistocene sequence outcropping in Cava Puleo (Ficarazzi, Palermo, Sicilia). Palaeogeogr. Palaeoclim. Palaeoecol. 45: 75-86, 3 figs, 1 pl.

Cantraine, F., 1841. Malacologie méditerranéenne et litorale, ou description des mollusques quivivent dans la Méditerranée ou sur le continent de l'Italie, ainsi que des coquilles qui se trouvent dans les terrains tertiaires italiens, avec des observations sur leur anatomie, leurs moeurs, leur analogie et leur gisement. Ouvrage servant de faune malacologique italienne et de complément à la Conchiologia fossile subapennina de Brocchi. Mém. Acad. R. Brux. 13: 1-173, 6 pls.

Casanova, B., Ducret, F. and Rampal, J., 1973. Zooplancton de Méditerranée orientale et de Mer Rouge (chaetognathes, euphausiacés, ptéropodes). Rapp. Proc.-verb. Réunions Comm. intern. Expl. Sci. Mer Méditerr. 21(8): 515-519.

Casanova, J.-P., 1980. Campagnes du 'Meteor' dans 'Atlantique N-E. Siphonophores, méduses et thécosomes. Distribution verticale et comparaisons faunistiques avec la Méditerranée. 'Meteor' Forschungserg. (D)32: 15-32, 6 tabs, 6 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.

Chen, C. and Hillman, N. S., 1970. Shell-bearing pteropods as indicators of water masses off Cape Hatteras, North Carolina. Bull. Mar. Sci. Gulf Caribb. 20(2): 350-367, 4 tabs, 3 figs.

Chenu, J. C., 1859. Manuel de conchyliologie et de paléontologie conchyliologique, 1. Paris (Masson): i-vii, 1-508, 3707 figs.

Orbigny, A. d', 1836-1844. Mollusques, echinodermes, foraminifäres et polypiers, recueillis aux Iles Canaries par MM. Webb et Berthelot. In: P. B. Webb and S. Berthelot (eds). Histoire naturelle des Iles Canaries 2(2): 1-117, 7 pls.

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.

Dadon, J. R. and Boltovskoy, D., 1982. Zooplanktonic recurrent groups (Pteropoda, Euphausiacea, Chaetognatha) in the southeastern Atlantic Ocean. Physis Secc., (A)41(100): 63-83.

Dadon, J. R. and Esnal, G. B., 1995. Abundance and assemblages of planktonic Tunicata (Chordata) and Thecosomata (Mollusca) off South Brazil. Physis, Secc. A. 50. (118-119): 25-30.

Dadon, J. R. and Magaldi, N. H., 1995. Mesoscale distribution of Thecosomata(Gastropoda) in the Brazil- Malvinas confluence compared with simultaneous satellite images of surface temperature. Iheringia, Sér. zool. 78: 157-160.

Dadon, J. R., 1989. Pteropoda Euthecosomata del Mar Epicontinental Argentino y Adyacencias. Thesis Univ. Buenos Aires: 1-285. (mimiogr.)

Dall, W. H., 1889a. A preliminary catalogue of the shell-bearing marine mollusks and brachiopods of the south-eastern coast of the United States, with illustrations of many of the species. Bull. U.S. nat Mus. 37: 3-221, 74 pls.

Blainville, [H. M. D.] de, 1825a. Manuel de malacologie et de conchyliologie. Paris (Levrault): i-viii, 1-648.

Blainville, [H. M. D.] de, 1827b. Manuel de malacologie et de conchyliologie. Paris (Levrault) 649-664 (Nouvelles additions et corrections au genera) 1827; atlas 109 pls.

Jong, K. M. de, and Coomans, H. E., 1988. Marine Gastropods from Curaçao, Aruba and Bonaire. Sud. fauna Curaçao other Caribb. Isl. 121: 1-216.

Deevey, G. B., 1971. The annual cycle in quantity and composition of the zoo-plankton of the Sargasso Sea off Bermuda, 1. The upper 500 m. Limn. Oceanogr. 16(2): 219-240.

Deshayes, G. P. and Milne Edwards, H., 1836. Histoire naturelle des animaux sans vertebres, présentant les caracteres généraux et particuliers de ces animaux, leur distribution, leurs classes, leurs familles, leurs genres, et la citation des principales especes qui s'y rapportent; précédée d'une introduction offrant la détermination des caracteres essentiels de l'animal, sa distinction du végétal et des autres corps naturels; enfin, l`exposition des principes fondamentaux de la zoologie, par J. B. P. A. de Lamarck. Deuxieme édition, revue et augmentée de notes présentant les faits nouveaux dont la science s'est enrichie jusqu'à ce jour, 7. Histoire des mollusques. Paris (J. B. Bailliere): 1-736.

Diester-Haass, L. and Spoel, S. van der, 1978. Late Pleistocene pteropod-rich sediment layer in the N. E. Atlantic and protoconch variation of Clio pyramidata Linnaeus, 1767. Palaeogeogr., Palaeoclim., Palaeoecol. 24: 85-109.

Forbes, E., 1844a. Report on the Mollusca and Radiata of the Aegean Sea, and on their distribution, considered as bearing on geology. Report Thirteenth Meet. British Assoc. Advanc. Sci. held at Cork in August 1843: 131-193.

Froget, C. and Pastouret, L., 1972. Les ptéropodes, moyen d'étude de la chronoclimatologie quaternaire. Comparaison de deux carottes prélevées en Méditerranée occidental et orientale. Rapp. Comm. int. Explor. Sci. Mer Médit., Monaco 20(4): 611-614.

Frontier, S., 1963a. Héteropods et ptéropodes récoltes dans le plankton de Nosy-Bé. Cah. ORSTOM 6(2): 213-227.

Frontier, S., 1973b. Zooplancton de la région de Nosy-Bé, 6. Ptéropodes hétéropodes, premier partie: especes holonéritiques et néritiquesinternes. Cah. ORSTOM, Océanogr. 11(3): 273-289, 17 figs.

Frontier, S., 1973c. Zooplancton de la région de Nosy-Bé, 7. Ptéropodes, hétéropodes, 2. Especes néritiques. externes et océaniques tolérantes. Cah. ORSTOM, sér. océanogr. 11(3): 291-302.

Fuchs, Th., 1905. Über Pteropoden- und Globigerinenschlamm in Lagunen von Koralleninseln. Verhandl. k. k. geol. Reichsanst. 7-8: 169-172.

Furnestin, M. L., 1968. Le zooplancton de la Méditerranée (bassin occidental), essay de synthese. J. Cons. int. Explor. Mer, J. Cons. 32(1): 25-69, 9 figs.

Furnestin, M. L., 1979. Aspects of the zoogeography of Mediterranean plankton. In: S. van der Spoel and A. C. Pierrot-Bults (eds). Zoogeography and diversity in plankton. Utrecht (Bunge Sci. Publ.): 191-253.

Gabe, M., 1959. Particularités histochimiques de la glande hypobranchiale des ptéropodes thécosomes. Ann. Histochim. 4(2): 85-93.

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

Gegenbaur, C., 1855b. Untersuchungen über Pteropoden und Heteropoden. Ein Beitrag zur Anatomie und Entwicklungsgeschichte dieser Thiere. Leipzig (Engelmann): i-vii, 1-228, 8 pls.

Geronimo, I. di, 1974b. Molluschi pelagici in livelli di marne mioceniche presso Vetto (R. Emilia). Conchiglie 10(9-10): 181-192, 1 pl.

Gilmer, R. W. and Harbison, G. R., 1986. Morphology and field behavious of pteropod molluscs: feeding methods in the families Cavoliniidae, Limacinidae and Peraclididae (Gastropoda: Thecosomata). Mar. Biol. 91: 47-57, 1 tab., 7 figs.

Gilmer, R. W., 1986. Preservation artifacts and their effects on the study of euthecosomatous pteropod mollusks. Veliger 29(1): 48-52, 2 figs.

González, C. and Princz, D., 1979. Moluscos heteropodos y pteropodos de la zone central del caribe venezolano. Bol. Inst. oceonogr. Cumana 18(1-2): 99-107.

Gray, J. E., 1850. Catalogue of the Mollusca in the collection of the British Museum, 2. Pteropoda. London (British Museum, E. Newman): iv + 45 pp.

Grazzini, V. C. and Rosenberg, H. Y., 1969. Étude paléoclimatique d'une carotte de Méditerranée orientale. Revue Geogr. phys. Géol. dynam. (2)11(3): 279-292, 3 figs, 1 pl.

Grecchi, G. and Bertolotti, M., 1988 Interpretazione paleoclimatica della carota CG18-BAN82 basata sull'analisi di Thecosomata Euthecosomata del Quaternario del Mediterraneo orientale. Bull. Mus. Reg. Sci. Nat. Torino 6(1): 73-132.

Grecchi, G., 1982. Pteropodi pliocenici dell'Italia settentrionale. Riv. Ital. Paleont. 87(4): 703-738, 2 tabs, 5 figs, pls 52-54.

Grossman, E. L., Betzer, P. R., Dudley, W. C. and Dunbar, R. B., 1986. Stable isotopic variation in pteropods and atlantids from north Pacific sediment traps. Mar. Micropaleont. 10(1-3): 9-22.

Haagensen, D. A., 1976 Caribbean zooplankton. Part II. Thecosomata. Off. Nav. Res. Dept. of the Navy. U. S. Govt. Print Off. Washington D. C.: 551-712.

Hartmann, J. and Weikert, H., 1969. Tagesgang eines Myctophiden (Pisces) und zweier von ihm gefressener Mollusken des Neustons. Kieler Meeresforschungen 25(2): 328-330, 1 fig.

Herman, Y., 1971b. Vertical and horizontal distribution of pteropods in quaternary sequences. In: B. M. Funnel and W. R. Riedel. The micropalaeontology of oceans: 468-486. Univ. Press, Cambridge.

Hida, T. S., 1957. Chaetognaths and pteropods as biological indicators in the North Pacific. U. S. Fish and Wildlife Service, Special Science. Report Fisheries 215: 1-13.

Hubendick, B., 1951. Pteropoda, with a new genus. Further zoological results of the Swedish Antarctic Expedition 1901-1903, 4(6): 1-10.

Ivanova, E. V., 1985. Late Quaternary biostratigraphy and paleotemperatures of the Red Sea and the Gulf of Aden based on planktonic Foraminifera and pteropods. Mar. Micropal. 9: 335-364.

Janssen, A. W., 1989a. Pteropoda (Gastropoda, Euthecosomata) from the Australian Cainozoic. Scripta Geologica 91: 1-76.

Jeffreys, J. G., 1870b. Mediterranean Mollusca. Ann. Mag. nat. Hist. 4(6): 65-86.

Lewis, J. B. and Fish, A. G., 1969. Seasonal variation of the zooplankton fauna of surface waters entering the Caribbean Sea at Barbados. Caribb. J. Sci. 9(1-2): 1-24.

MacPherson, J. H. and Gabriel, C. L., 1962. Marine mollusca of Victoria. Thecosomata: 248-250.

Magaldi, N. H., 1971b. Sobre la presencia en el Atlantico sudoccidental de Cymbulia peroni de Blainville, 1818. Neotropica 17(53): 92-94, 1 fig.

Magaldi, N. H., 1974. Moluscos holoplanktonicos del Atlantico sudoccidental. I Pteropodos euthecosomados colectados por el "Atlantis II" en marzo de 1971. Comunicac. Soc. Malacol. Uruguay 4(27): 1-20.

Magaldi, N. H., 1977a. Moluscos holoplanctonicos del Atlantico suboccidental. III. Heteropods y pteropods de aguas superficiales Brasilenas y Uruguayas. Com. Soc. Malac. Urug. 4 (33): 295-325.

Massy, A. L., 1920. Eupteropoda (Pteropoda Thecosomata) and Pterota (Pteropoda Gymnosomata). British Antarctic ('Terra Nova') Expedition 1910, Nat. Hist. Rep., Zoology 2(9). Mollusca, 3: 203-232, 9 figs.

McGowan, J. A., 1967. Distributional atlas of pelagic molluscs in the California Current region. CALCOFI Atlas 6: 1-218.

McGowan, J. A., 1968. The Thecosomata and Gymnosomata of California. Veliger 3 (suppl.): 103-130, pls 12-20.

Meisenheimer, J., 1905c. Pteropoda. Deutsch. Tiefsee Exp. 1898-1899 IX: 1-314, Atlas Pl. 1-27 Map 1-9.

Menzies, R. J., 1958. Shell-bearing pteropod gastropods from mediterranean plankton (Cavoliniidae). Pubbl. Staz. Zoologica Napoli 30 (3): 381-401, 5 tabs, 9 figs, 8 maps.

Michel, H. B. and Michel, J. F., 1991 Heteropoda and Thecosomata (Mollusca: Pteropoda) macroplankton in the Florida straits. Bull. Mar. Sci. 49(1/2): 562-574.

Monterosato, T. A. di, 1875a. Nuova rivista delle conchiglie mediterranee. Atti Accad. Sci. Lett. Arti Palermo (2a)5 (Cl. Sci. Nat. esatto): 1-50.

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.

Ode, H., 1991. Distribution and records of the marine mollusca in the North-West Gulf of Mexico. Texas Conch. 27(3/4): 72-83.

Okutani, T., 1957a. Holoplanktonic Gastropoda in the 'Kuroshio' area, south of Hinshu, May 1955. Rec. oceanogr. Wks. Japan, (NS) Spec. No.: 134-142, 3 figs.

Pafort-van Iersel, G. J. S., 1985a. Contributions to pelagic zoogeography of the mid North Atlantic Ocean, 1. Distribution of pteropods, heteropods and silver hatchetfishes. In: G. J. S. Pafort-van Iersel. A contribution to pelagic zoogeography of the mid North Atlantic Ocean (7th paper) (Thesis Univ. van Amsterdam): 1-45, 5 tabs, 4 figs, 27 append.

Peck, J. I., 1894. Scientific results of explorations by the U. S. Fish commission steamer Albatross, 26. Report on the pteropods and heteropods collected by the U. S. Fish commission steamer Albatross during the voyage from Norfolk, Va., to San Francisco, Cal., 1887-1888, 1. The thecosomatous pteropods. Proc. U. S. Nat. Museum, (1893) 16: 451-466, pls 53-55.

Pelseneer, P., 1888a. Report on the Pteropoda collected by H. M. S. Challenger during the years 1873-1876, 2. The Thecosomata Reports on the scientific. Results of the voyage of H. M. S. Challenger during the years 1873-1876 (zool.) 23(1): 1-132, 2 figs, 2 pls.

Pelseneer, P., 1888b. Report on the Pteropoda collected by H. M. S. Challenger during the years 1873-1876, 3. Anatomy Reports on the scientific. Results of the voyage of H. M. S. Challenger during the years 1873-1876(zool.) 23(2): 1-97, 1 tab., 5 figs, 5 pls.

Pfeffer, G., 1880b. Die Pteropoden des Hamburger Museums. Abhandlu. Naturwissensch. Ver. Hamburg 7: 69-99, pl. 7.

Pruvot-Fol, A., 1954. Mollusques opisthobranches. Faune de France 58. Paris (Lechevalier): 1-460, 173 figs, 1 pl.

Quoy, J. R. C. and Gaimard, J., 1827a. Observations zoologiques faites á bord de l'Astrolabe, en mai 1826, dans le détroit de Gibraltar (suite et fin). Description des genres biphore, carinaire, hyale, fläche, cléodore, anatife et briarée. Ann. Sci. Nat. 10: 225-239, (atlas) pls 7-8.

Quoy, J. R. C. and Gaimard, J., 1832. Voyage de découvertes de l'Astrolabe, exécuté par ordre du roy, pendant les années 1826-1827-1828-1829, sous le commendement de M. J. Dumont d'Urville. Zoologie, 2: 1-686 (1832); atlas (with slightly differing title) mollusques pls 1-93, zoophytes pls 1-26 (without explications) (1833).

Rampal, J., 1965a. Ptéropodes thécosomes indicateurs hydrologiques. Rev. Trav. Inst. Pàches Marit. (Paris) 29(4): 393-400, 5 figs.

Rampal, J., 1966. Pèches planctoniques superficielles et profondes en Méditerranée occidentale (campagne de la 'Thalassa', janvier 1961, entre les îles Baléares, la Sardaigne et l'Algérois, 6). Ptéropodes. Rev. Trav. Inst. Pàches Marit. (Paris) 30: 375-383, 6 figs.

Rampal, J., 1967. Répartition quantitative et bathymétrique des ptéropodes thécosomés récoltés en Méditerranéee occidentale au Nord du 40° parallèle. Remarques morphologiques sur certaines espèces. Rev. Trav. Inst. Pèches Marit. (Paris) 31(4): 1-13.

Rampal, J., 1968a. Les ptéropodes thécosomes en Méditerranée. Comm. Int. Explor. sci. Mer Méditerr.: 1-142, 6 tabs, 12 figs. (PhD thesis).

Rampal, J., 1968b. Neurosécrétion chez quelques ptéropodes thécosomes. Rapp. Proc.-verb. Réunion Comm. intern. Explor. scient. Mer Médit. 19(3): 543-545, 1 fig.

Rampal, J., 1973a. Clés de détermination des ptéropodes thécosomes de Méditerranée et de l'Atlantique euroafricain. Rev. Trav. Inst. Pàches Marit. (Paris) 37(3): 369-381.

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.

Rampal, J., 1977b. Diversité de structure de la coquille chez les thécosomes. Atti Soc. Ital. Sci. Nat. Museo Civ. St. Nat. Milano 118(2): 207-211, 1 fig.

Rampal, J., 1980a. Biogeographie Méditerranéne d'apres l'etude des Thécosome (Mollusques pelagiques). J. Etud. Syst. Biogeogr. Médit Cagliari CIESM: 45-54.

Rampal, J., 1990. Les Thecosomes de la mer Rouge. Bull. Inst. Oceanogr. Monaco (spec.) 7: 103-107.

Rang, P. C. A. L. and Férussac, D. de, 1830. Ueber die Pteropoden und andere Mollusken. Not. Geb. Natur Heilk. 26(17)(567): 260-262.

Rang, P. C. A. L., 1828b. Notice sur quelques mollusques nouveaux appartenant au genre Cléodore, et établissement et monographie du sous-genre Créseis. Ann. Sci. Nat. 13: 302-319, pls 17-18.

Rao, T. S. S., 1979. Zoogeography of the Indian Ocean. In: Spoel, S. van der and Pierrot-Bults, A. C. (eds). Zoogeography and diversity in plankton. Utrecht (Bunge Sci. Publ.): 254-292.

Richter, G., 1973b. Zur Stammesgeschichte pelagischer Gastropoden. Natur und Museum 103(8): 265-275, 4 tabs, 9 figs.

Richter, G., 1979. Die thecosomen Pteropoden der "Meteor"-Expedition in den Indischen Ozean 1964/65. "Meteor" Forsch. Ergebnisse (D) 29: 1-29.

Ros, J., 1976. Catálogo provisional de los Opistobranquios (Gastropoda, Euthyneura) de las costas ibéricas. Miscel. Zool. 3(5): 21-48.

Rottman, M., 1976. Euthecosomatous pteropods (Mollusca) in the Gulf of Thailand and the South China Sea: seasonal distribution and species associations. Naga Rep. 4 (6): 1-117.

Rottmann, M. L., 1978. Ecology and recurrent groups of pteropods, euphasiids and chaetognaths in the Gulf of Thailand and the South China Sea. Mar. Biol. 48(1): 63-78, 7 tabs, 4 figs.

Sakthivel, M., 1967. A preliminary report on the distribution and relative abundance of Euthecosomata with a note on the seasonal variation of Limacina species in the Indian Ocean. In: Proc. Symp. 'Indian Ocean' March 1967. Bull. N. I. S. I. 38: 700-717, 17 figs.

Sakthivel, M., 1973a. Biogeographical change in the latitudinal boundary of a bisubtropical pteropod Styliola subula (Quoy and Gaimard) in the Indian Ocean. In: Zeitschel, B. and Gerlach, S. A. (eds). The biology of the Indian Ocean. Ecological studies 3. Berlin, Heidelberg, New York (Springer): 401-404, 2 figs.

Sakthivel, M., 1975. A note an the annual variation of the euthecosomatous pteropods along the meridian 78° East in the Indian Ocean. Bull. Plank. Soc. Japan 21: 41-44.

Sakthivel, M., 1976a. Geographical and seasonal distribution of Euthecosomata (Pteropoda, Gastropoda) in the Indian Ocean. Meteor Forsch. Ergebniss D23: 1-22.

Sakthivel, M., 1977. Further studies of plankton ecosystems in the eastern Indian Ocean, 8. Seasonal, diurnul and latitudinal variations in abundance of Euthecosomata along the 110° meridian. Aust. J. Mar. Freshw. Research 28(5): 663-671.

Schiemenz, P., 1906. Die Pteropoden der Plankton Expedition. Erg. Plankt. Exp. Humboldt Stift. 2 F.b.: 1-37.

Seguenza, G., 1875a. Studi paleontologici sulla fauna malacologica dei sedimenti pliocenici depositatisi a grandi profonditá, 1-2. Bull. Soc. Malacol. Ital. 1 (2): 18-49

Sentz-Braconnot, E., 1965. Sur la capture des proies par le ptéropode gymnosome Pneumodermopsis paucidens (Boas). Cah. Biol. Mar. 6: 191-194, 1 fig.

Souleyet, [F. L. A.], 1851. (introd. S. Petit) Ordre des ptéropodes. J. Conchyl. 2: 28-38.

Sowerby, G. B., 1878. In: Reeve, L. A.: Conchologia iconica or illustrations of shells of molluscous animals. Monograph of the genus Pteropoda vol. 20, in front pls 1-7 and pls 1-6, Reeve and Co, London.

Sowerby, G. B., 1887. Thesaurus conchyliorum, or monographs of genera of shells 5. London (Sowerby): 1-305, pls 424-517.

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Styliola subula