Title: Malacology Content: Malacology is the study of molluscs. These animals include snails, slugs, octopus, squid, and bivalves generally, such as clams and mussels. Most of them have shells. The shells are often collected for their beauty and interest. Many people eat molluscs, especially those people who live near the ocean. Those scientists who study molluscs are called malacologists. They identify and classify them, and find out everything they can about their lives. == Types == === Types of gastropods === The gastropods are the most common type of mollusc. They have about 70,000 described species. * marine gastropod ** sea snail ** sea slug * non-marine gastropod ** freshwater gastropod: with very few exceptions, the only freshwater molluscs are freshwater snails *** freshwater snail ** terrestrial gastropod: gastropods are the only group of molluscs which have some species living on land *** land snail *** land slug *** semi-slug === Types of bivalves === With 20,000 described species, bivalves are the second commonest class of molluscs. There are several classifications of bivalves in use. This is a rough guide: *Pteromorphia including the **File shells **Mussels **Oysters **Pearl oysters and pen shells *Heterodonta **Soft-shelled clams **Shipworms (Turedo) **Hard- shelled clams, cockles and razor shells ==Malacologists== thumb|Malacologist and friend * Horace Burrington Baker (1889–1991)Horace Burrington Baker (1889–1971) * Henri Marie Ducrotay de Blainville (1777-1850) * Jean Guillaume Bruguière (1749-1798) * William J. Clench (1897-1984)William J. Clench (1897-1984) * Georges Cuvier (1769-1832) * Gérard Paul Deshayes (1795-1875) * John Edward Gray (1800-1875) * Otto Friedrich Müller (1730-1784) * Alcide d'Orbigny (1802-1857) * Isabel Pérez Farfante (1916-2009)History USNMCriales, María M. 2009. Obituario: Isabel Pérez-Farfante 24 de julio de 1916 – 20 de agosto de 2009. Ciencia y Mar. XIII(37):77-80. * Constantine Samuel Rafinesque (1783-1840)Constantine Samuel Rafinesque (1783-1840) * Lovell Augustus Reeve (1814-1865)Conchologica Iconica * María Isabel Scott Hylton (1889-1990)Ni solas ni resignadas: la participación femenina en las actividades científico- académicas de la Argentina en los inicios del siglo XX *James Sowerby (1757–1822) * George Brettingham Sowerby I (1788-1854) * George Brettingham Sowerby II (1812-1884) * George Brettingham Sowerby III (1843-1921) * William John Swainson (1789-1855) == Museums == Museums that have either exceptional malacological research collections (behind the scenes) and/or exceptional public exhibits of molluscs: * Academy of Natural Sciences of Philadelphia * American Museum of Natural History * Bailey-Matthews Shell Museum * Cau del Cargol Shell Museum * Museum of Comparative Zoology at Harvard * Royal Belgian Institute of Natural Sciences, Brussels: with a collection of more than 9 million shells (mainly from the collection of Philippe Dautzenberg) * Smithsonian Institution == Some mollusks == Image:Acanthopleura_granulata_with_Nerita_tessellata.jpg|two chitons with small sea snails Image:Cassidae sp.jpg|sea snail Image:Limax cinereoniger.JPG|land slug Image:Snail black on grass2.jpg|land snail Image:Mya arenaria.jpg|marine clam Image:Unknown_Unionidae_4.jpg|freshwater clam Image:Octo2.jpg|octopus Image:Sepiotenthis lessoniana.jpg|squid