Helix aspersa, common name the garden snail; has two recent synonyms Cornu aspersum and Cantareus aspersus.) This species is one of the most well-known of all terrestrial molluscs, a pulmonate gastropod.
It is native to the Mediterranean region and western Europe, from northwest Africa and Iberia east to Asia Minor, and north to the British Isles. However, it is very widely introduced and naturalised elsewhere in the world.
Although this species is edible, it is often regarded as a pest in gardens, especially where it has been accidentally introduced.
This species of snail creates and uses love darts.
The adult bears a hard, thin calcareous shell 25–40 mm in diameter and 25–35 mm high, with four or five whorls. The shell is somewhat variable in colour and shade but is generally dark brown or chestnut with yellow stripes, flecks, or streaks.
The body is soft and slimy, brownish-grey, and is retracted entirely into the shell when the animal is inactive or threatened. During dry and cold weather, the aperture of the shell is sealed with a thin membrane of dried mucus which is known as an epiphragm, which helps the snail retain moisture. During times of activity the head and foot emerge. The head bears four tentacles, the upper two of which have eye-like light sensors, and the lower two of which are smaller, tactile and olfactory sensory structures. The tentacles can be retracted into the head. The mouth is located beneath the tentacles, and contains a chitinous radula which the snail uses to scrape and manipulate food particles.
The snail's muscular foot contracts to move the animal, and secretes mucus to facilitate locomotion by reducing friction against the substrate. It moves at a top speed of 1.3 centimetres per second (47 metres per hour), and has a strong homing instinct, readily returning to a regular hibernation site.
Like other Pulmonata, it is a hermaphrodite, producing both male and female gametes. During a mating session of several hours, two snails exchange sperm and after about two weeks the young are born live, and take one to two years to reach maturity.
It is a food source for many other animals, including small mammals, many bird species, lizards, frogs, centipedes, and predatory insects.
There is a variety of snail control measures that gardeners and farmers can take to reduce damage. Traditional pesticides are still in use, as are many less toxic control options such as concentrated garlic or wormwood solutions. Copper metal is repellent to snails. A copper band around the trunk of a tree will prevent snails from reaching the foliage and fruit.
The species is an agricultural and garden pest, an edible delicacy, and occasionally a household pet.
In French cuisine, it is known as petit gris, and is served as escargot. The snails are farm-raised or bred as a hobby and enjoyed with garlic butter or cream sauces. Their texture is slightly chewy. The practice of rearing snails for food is known as heliciculture.
Recently, this snail has gained popularity as the chief ingredient in skin creams and gels (crema/gel de caracol) sold within the Latino community and used for wrinkles, scars, dry skin, and acne.
It has been introduced to many regions around the world, including southern Africa, Australia, New Zealand, North America and southern South America. It was introduced to California as a food animal in the 1850s and is now a notorious agricultural pest there, especially in citrus groves. Many areas have quarantines established for preventing the importation of the snail in plant matter.
The peptide pQFYRFamide is encoded on the FMRFamide precursor of the snail Helix aspersa but does not activate the FMRFamide-gated sodium current.
Dec 01, 1996; Introduction The tetrapeptide FMRFamide (Price and Greenberg, 1977) is undoubtedly present in all molluscs (Greenberg and Price,...
Use of the Land Snail Helix Aspersa as Sentinel Organism for Monitoring Ecotoxicologic Effects of Urban Pollution: An Integrated Approach
Jan 01, 2006; Atmospheric pollution from vehicular traffic is a matter of growing interest, often leading to temporary restrictions in urban...
Conditioning of Tentacle Lowering in the Snail (Helix Aspersa): Acquisition, Latent Inhibition, Overshadowing, Second-Order Conditioning, and Sensory Preconditioning
Aug 01, 2006; In a series of related experiments, we studied associative phenomena in snails (Helix aspersa), using the conditioning procedure...