Discus rotundatus (Muller, 1774)
The rotund disc snail is very small. It is approximately 2.5 mm in height and ranges in width from 5.5-7.2 mm, with about 4.5-6 whorls. This flattened shell is almost disc-shaped and can either be grey or light yellow-brown in color, with prominent uniformly arranged reddish brown blemishes. The body of the animal is blue-grey or blue-black, but pale on the sides of the foot.
Western and Central Europe
- U.S.: California, New Jersey, New York, Massachusetts, Washington State
Europe: Southern Scandinavia, Northern Scotland to Algeria, Spain, Ireland to Ukraine, Turkey, Denmark, Norway
This snail inhabits forests, greenhouses, wasteland and gardens. They often lay fewer than 5 eggs per clutch.
- Helix rotundatus Muller, 1774
Anderson 2005; Grimm et al. 2009; Forsyth 2004; Horsak 2004; Kerney et al. 1979