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Garden Snail

Scientific Name
Cantareus aspersus
Scientific Author
(Müller, 1774)
Taxonomy
(Gastropoda: Pulmonata: Helicidae: Helicinae: Helicini)
Pest Status
0 Unknown
0 Unknown
Status
NZ - Exotic
NZ - Exotic
Reliability
High
High
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Diagnostic Images

Headside - Adult
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Caption
GAS11
Source
Caroline Harding MAF
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Diagnostic Images (6)
Diagnostic Notes
Shell globose, to 33 mm high by 38 mm in diameter, of 4.5 whorls, the last whorl descending in front, dull yellow with 4 or 5 broad dark brown bands, the bands often broken up into blotches. Postembryonic whorls covered with strong transverse striae and, on the later whorls, a network of coarse irregular wrinkles imparting a shagreened appearance. Protoconch of 1.5 whorls, smooth, uniformly pale fawn. Aperture obliquely oval to almost circular. Peristome white, glossy, not continuous, with lip slightly reflected but not thickened. Columella erect and reflected, usually closing umbilicus in adults. Animal pale brown, greenish brown, or blackish-grey, dark on dorsal aspect of head and paling slightly to foot margin; mantle collar blackish-grey, closely and finely sprinkled with pale grey-yellow; tubercles on head prominent, with pale summits; sole pale grey. Jaw about 3.7 mm wide, broadly crescentric, with anterior cutting margin strongly concave, scored with a variable number of prominent vertical ribs or folds strongly denticulating the upper and lower margins, and with distinct striation. Radula with about 125 transverse rows of teeth, each varying around the formula 23+20+C+20+23. Central tooth tricuspid, on a quadrate basal plate, with a broadly elongate mesocone and short but distinctly pointed ectocones. Lateral teeth tricuspid or bicuspid, on a quadrate basal plate, with mesocone broader and shorter than on central tooth, endocone generally absent, and ectocone small but distinct; 20th tooth transitional, with mesocone bifurcated and ectocone more prominent. Marginal teeth on small, broadly rectangular basal plates, of 3 or 4 cusps owing to division of mesocone and ectocone; teeth on outermost parts of radula ribbon often represented by basal plates lacking cusps.

References

- Barker, G.M. (1999). Naturalised terrestrial Stylommatophora (Mollusca: Gastropoda). Fauna of New Zealand 38. Manaaki Whenua Press, Lincoln, 253 pp.
More Information
Specimen Contact
MAF Plant Health & Environment Laboratory
Author
MAF Plant Health & Environment Laboratory
Created
14/04/2011 10:08 AEST
Last Updated
08/05/2014 21:25 AEST
Citation
MAF Plant Health & Environment Laboratory (2011) Garden Snail (Cantareus aspersus) Updated on 5/8/2014 9:25:17 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

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