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The shells are usually flattened or depressed conical. Globular shells are found in the genera Helix, Maltzanella, Lindholmia, Cornu, Cantareus, Eremina, and Idiomella. One species, Cylindrus obtusus, has a cylindrical shell. In some genera, especially in Cepaea, the shells are brightly colored and patterned.
Roasted snail shells have been found in archaeological excavations, an indication that snails have been eaten since prehistoric times. [4] [5]Lumaca romana, (translation: Roman snail), was an ancient method of snail farming or heliciculture in the region about Tarquinia.
Shells of two different species of sea snail: on the left is the normally sinistral (left-handed) shell of Neptunea angulata, on the right is the normally dextral (right-handed) shell of Neptunea despecta The shell of a large land snail (probably Helix pomatia) with parts broken off to show the interior structure.
Helix is a genus of large, air-breathing land snails native to the western Palaearctic and characterized by a globular shell. [ 1 ] [ 2 ] It is the type genus of the family Helicidae , and one of the animal genera described by Carl Linnaeus [ 3 ] at the dawn of the zoological nomenclature .
Helix pomatia, known as the Roman snail, Burgundy snail, or escargot, is a species of large, air-breathing stylommatophoran land snail native to Europe. It is characterized by a globular brown shell. It is characterized by a globular brown shell.
The largest living species is the Giant African Snail or Ghana Tiger Snail (Achatina achatina; Family Achatinidae), which can measure up to 30 cm. [13] [14] The largest land snails of non-tropical Eurasia are endemic Caucasian snails Helix buchi and Helix goderdziana from the south-eastern Black Sea area in Georgia and Turkey; diameter of the ...
The accepted name of the species was long considered to be Helix aspersa, a member of the genus Helix, like the Roman snail Helix pomatia. However, in a number of publications since 1990, [ 6 ] it has instead been placed in various genera previously considered as subgenera of Helix .
The upper pair of tentacles on the head of Helix pomatia have eye spots, but the main sensory organs of the snail are sensory receptors for olfaction, situated in the epithelium of the tentacles. Main articles: Sensory organs of gastropods and Nervous system of gastropods