Arianta arbustorum

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Arianta arbustorum
Snail on fence.jpg
Arianta arbustorum
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia

clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora

informal group Sigmurethra
Superfamily:
Helicoidea
Family:
Helicidae
Subfamily:
Ariantinae
Genus:
Arianta
Species:
A. arbustorum
Binomial name
Arianta arbustorum
(Linnaeus, 1758)[1]
Synonyms

Helix arbustorum Linnaeus, 1758

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Arianta arbustorum is a medium-sized species of land snail, sometimes known as the "copse snail", a terrestrial pulmonate gastropod mollusk in the family Helicidae.

Subspecies

Several subspecies are recognized by some authors:

  • Arianta arbustorum alpicola Férussac, 1821
  • Arianta arbustorum arbustorum
  • Arianta arbustorum canigonensis
  • Arianta arbustorum picea
  • Arianta arbustorum pseudorudis
  • Arianta arbustorum repellini
  • Arianta arbustorum styriaca
  • Arianta arbustorum vareliensis

Distribution

This species is native to Europe:

Arianta arbustorum is introduced to North America, but is only known from Canada, where established populations are known from Newfoundland, New Brunswick, Ontario,[5] and Prince Edward Island.[6]

This species has not yet become established in the USA, but it is considered to represent a potentially serious threat as a pest, an invasive species which could negatively affect agriculture, natural ecosystems, human health or commerce. Therefore, it has been suggested that this species be given top national quarantine significance in the USA.[7]

Description

apertural view of the shell of Arianta arbustorum (top left); lateral view (top right); apical view (bottom left) and umbilical view (bottom right)

The shell is usually brown with numerous pale yellowish rows of spots and usually with a brown band above the periphery, occasionally yellowish, reddish or with greenish hue, weakly striated and with fine spiral lines on the upper side.[2] The shell has 5-5.5 convex whorls with deep suture.[2] The last whorl is slightly descending near the aperture.[2] The aperture is with prominent white lip inside.[2] The apertural margin is reflected.[2] Umbilicus is entirely covered by the reflected columellar margin.[2]

The width of the shell is 18–25 mm.[2] The height of the shell is 12–22 mm.[2] Dimensions are locally variable.[2]

The shell shape is globular in most present-day populations, but originally is believed to have been depressed in the Pleistocene, before lowlands were invaded and shells became globular, re-invading mountain regions except some isolated spots among glaciers.[2]

The animal is usually black.[2]

Life cycle

Arianta arbustorum lives in forests and open habitats of any kind.[2] It requires humidity.[2] It lives also in disturbed habitats (not in Ireland where it is restricted to old native woodland).[2] It may locally tolerate non-calcareous substrate, in north Scotland also on sandhills.[2] In the Alps up to 2700 m, in Britain 1200 m, in Bulgaria 1500 m.[2]

It feeds on green herbs, dead animals and faeces.[2]

If snails hatched more than 50 m distant from each other, they are considered isolated since they would not move more than 25 m (neighbourhood area 32–50 m), usually they move about 7–12 m in a year, mostly along water currents.[2]

drawing of love dart of Arianta arbustorum

This species of snail makes and uses calcareous love darts during mating. Reproduction is usually after copulation, but self-fertilization is also possible.[2] The size of the egg is 3.2 mm.[8] Maturity is reached after 2–4 years.[2] The maximum age up to 14 years.[2]

Angiostrongylus vasorum has successfully experimentally infected this snail.[9]

References

This article incorporates public domain text from the reference.[2]

  1. ↑ Linnaeus C. (1758). Systema naturae per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. pp. [1-4], 1-824. Holmiae. (Salvius).
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 Species summary for Arianta arbustorum. AnimalBase, last modified 25 August 2010, accessed 8 October 2010.
  3. ↑ (Dutch) Arianta arbustorum — Anemoon
  4. ↑ New snail found in the Faroe Islands
  5. ↑ McAlpine, D.F., Schueler, F.W., Maunder, J.E., Noseworthy, R.G., & Sollows, M.C. 2009. Establishment and persistence of the copse snail, Arianta arbustorum (Linnaeus, 1758) (Gastropoda: Helicidae) in Canada. The Nautilus 123(1):14-18.
  6. ↑ McAlpine, D.F., & R.G. Forsyth. 2014. Occurrence of the Copse Snail, Arianta arbustorum (Helicidae) on Prince Edward Island: an addition to the North American range of a purported potential pest. Northeastern Naturalist 21(1):N5–N7.
  7. ↑ Cowie R. H., Dillon R. T., Robinson D. G. & Smith J. W. (2009). "Alien non-marine snails and slugs of priority quarantine importance in the United States: A preliminary risk assessment". American Malacological Bulletin 27: 113-132. PDF.
  8. ↑ Heller J.: Life History Strategies. in Barker G. M. (ed.): The biology of terrestrial molluscs. CABI Publishing, Oxon, UK, 2001, ISBN 0-85199-318-4. 1-146, cited page: 428.
  9. ↑ Conboy G. A. (30 May 2000) "Canine Angiostrongylosis (French Heartworm)". In: Bowman D. D. (Ed.) Companion and Exotic Animal Parasitology. International Veterinary Information Service. Accessed 24 November 2009.

External links

Studies

  • Baur, Anette; Baur, Bruno (2005) Interpopulation variation in the prevalence and intensity of parasitic mite infection in the land snail Arianta arbustorum ; Invertebrate Biology, Vol. 124 Issue 3, p194-201. 8p. 3 Charts. DOI: 10.1111/j.1744-7410.2005.00019.x.
  • Baur, Bruno & Locher Rolf (1998) Sperm allocation in the simultaneously hermaphroditic land snail Arianta arbustorum. Animal Behaviour. Oct98, Vol. 56 Issue 4, p839. 7p.
  • Baur, Bruno (1986) Patterns of dispersion, density and dispersal in alpine populations of the land snail Arianta arbustorum (L.) (Helicidae). Holarctic Ecology. Mai 1986, Vol. 9 Issue 2, p117-125. 9p
  • Haase Martin, Esch Susanne & Misof Bernhard (2013) Local adaptation, refugial isolation and secondary contact of Alpine populations of the land snail Arianta arbustorum. Journal of Molluscan Studies. Aout 2013, Vol. 79 Issue 3, p241-248. 8p.
  • Haase M & Bisenberger A (2003) Allozymic differentiation in the land snail Arianta arbustorum (Stylommatophora, Helicidae): historical inferences  ; Journal of Zoological Systematics & Evolutionary Research. Aout 2003, Vol. 41 Issue 3, p175-185. 11p. DOI: 10.1046/j.1439-0469.2003.00208.x.
  • Kleeweint Doris (1999), Population size, density, spatial distribution and dispersal in an Austrian population of the land snail Arianta arbustorum styriaca (Gastropoda: Helicidae) ; Journal of Molluscan Studies. Aout 1999, Vol. 65 Issue 3, p303-315. 13p. 3
  • Haase M & Misof B (2009), Dynamic gastropods: stable shell polymorphism despite gene flow in the land snail Arianta arbustorum. Dynamische Schnecken: stabiler Schalenpolymorphismus trotz Genflusses in der Landschnecke Arianta arbustorum. Journal of Zoological Systematics & Evolutionary Research. Mai 2009, Vol. 47 Issue 2, p105-114. 10p. DOI: 10.1111/j.1439-0469.2008.00488.x
  • Minoretti, Nicole; Stoll, Peter; Baur, Bruno (2013) Heritability of sperm length and adult shell size in the land snail Arianta arbustorum (Linnaeus, 1758) Journal of Molluscan Studies. Aout 2013, Vol. 79 Issue 3, p218-224. 7p.
  • Schüpbach, Hans U.; Baur, Bruno (2008), Parasitic mites influence fitness components of their host, the land snail Arianta arbustorum.. Invertebrate Biology, Vol. 127 Issue 3, p350-356. 7p. 1 Chart, 2 Graphs. DOI: 10.1111/j.1744-7410.2008.00138.x.
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