Arianta arbustorum

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Arianta arbustorum, sometimes known as the copse snail, is a medium-sized species of pulmonate land snail in the family Helicidae. Several subspecies are recognized by some authors: This species is native to Europe: Arianta arbustorum has been introduced to North America but is only known in Canada, where established populations are found in Newfoundland, New Brunswick, Ontario, and Prince Edward Island. This species has not yet become established in the US, but it is considered to represent a potentially serious threat as an invasive species that 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. The shell is usually brown with numerous rows of pale yellowish spots and with a brown band above the periphery, occasionally yellowish, reddish or greenish in hue, weakly striated and with fine spiral lines on the upper side. The shell has 5–5.5 convex whorls with a deep suture. The last whorl slightly descends near the aperture. The aperture has a prominent white lip inside. The apertural margin is reflected. Umbilicus is entirely covered by the reflected columellar margin.