Claude Sionnest (Syonnest ou Sionnet) (1749 Lyon - 31 January 1820) was a French naturalist. Born in a family which had traded as pharmacists for two centuries, had an early interest in natural sciences. After four years in the infantry, he became commandant de bataillon during the Reign of Terror. After 27 July 1794, he took charge of the police force in Lyon.
In 1798, Sionnest was named “physicien entomologiste’’ (medical entomologist) within the Société de santé (Health Society). In 1800, he joined the Agriculture Society of Lyon and occupied the post of treasurer for the next ten years. He was interested in entomology and published several memoires on insects harmful to agriculture. Also a botanist, he particularly studied the cryptogams of leaving many new handwritten notes concerning the Scientific Classification classifying systems of Dillen, Johannes Hedwig (1730–1799) and Beauvoir.
Sionnest had also a vast mineralogy collection classified according to the system of René Just Haüy and essayed a mineralogical description of the department of the Rhone. But it was malacology which held all his attention. The many manuscripts which he left show that he was principally concerned to establish ‘’systematic correspondences’’ of the various species current and fossil, terrestrial, fresh-water and marine, described and illustrated in the works of Geoffroy, Jean Louis Marie Poiret (1755–1834), Jean-Baptiste de Lamarck (1744–1829), George Cuvier (1769–1832), Jacques Philippe Raymond Draparnaud (1772–1804) and others less famous. He created his own classifying system to arrange the molluscs in his collection, a problem since it was a very particular system opposed to that of his friend, Draparnaud. His collection included 62 species not appearing in l'Histoire naturelle des Mollusques terrestres et fluviatiles de la France (the Natural History of Terrestrial and Fluviatile Molluscs of France) of Draparnaud and was consulted by Gaspard Louis André Michaud (1795–1880) when he wrote the supplement to this work.
Cernuella neglecta, the dune snail, is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Geomitridae.
Granaria frumentum is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Chondrinidae.
Macrogastra ventricosa is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Clausiliidae, the door snails.
Laciniaria plicata is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Clausiliidae, the door snails.
Vertigo pygmaea, common name the "crested vertigo", is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Vertiginidae, the whorl snails.
Vertigo antivertigo is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusc or micromollusc in the family Vertiginidae, the whorl snails.
Petasina unidentata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Hygromiidae, the hairy snails and their allies.
Columella edentula, common name the "toothless column snail", is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Truncatellinidae.
Aegopinella nitidula, common name the waxy glass snail, is a species of small land snail, a terrestrial pulmonate gastropod mollusk in the family Gastrodontidae, the glass snails.
Ena montana is a species of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Enidae.
Punctum pygmaeum is a species of very small, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails.
Punctum is a genus of very small air-breathing land snails, terrestrial pulmonate gastropod mollusks or micromollusks in the subfamily Punctinae of the family Punctidae, the dot snails.
Daudebardia brevipes is a species of air-breathing land snail or semi-slug, a terrestrial pulmonate gastropod mollusk in the family Oxychilidae which belongs to the "Limacoid clade".
Clausilia rugosa is a species of air-breathing land snails, a terrestrial pulmonate gastropod mollusc in the family Clausiliidae.
Milax gagates, known by the common name greenhouse slug, is a species of air-breathing, keeled, land slug, a shell-less terrestrial gastropod mollusc in the family Milacidae.
Hygromia limbata is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Hygromiidae.
Louis André Gaspard Michaud was a French malacologist. He is also known as Gaspard Michaud or as André Louis Gaspard Michaud.
Alfred Louis Pierre Germain was a French malacologist born in Niort, department Deux-Sèvres.
Cathaica fasciola is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae, which is similar to Cathaica pyrrhozona on shell morphology.
This page is based on this Wikipedia article Text is available under the CC BY-SA 4.0 license; additional terms may apply. Images, videos and audio are available under their respective licenses.
