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Cepaea nemoralis is highly polymorphic in shell colour and banding. The background colour of the shell varies along a continuum from brown through pink to yellow and sometimes almost white. [14] Additionally the shells can be with or without dark bands. The bands vary in intensity of colour, in width and in number, from zero to five.
The appearance of the shell is striking and has been compared to painted porcelain. [3] The background color of the shell is white or creamy-white, with thin bright spiral stripes. The stripes can be brown, black, pink, green, purple, or light yellow. A single shell can have stripes of a single color or as many as three different colors. [2]
The two Cepaea species share a genetic polymorphism for the colour and banding pattern of the shell. The background colour of the shell ranges from dark brown, through pink to yellow or even approaching white. This variation is continuous, but there are peaks in the distribution corresponding to brown, pink and yellow morphs. [13]
Theba pisana, common names the white garden snail, sand hill snail, white Italian snail, Mediterranean coastal snail, and simply just the Mediterranean snail, is an edible species of medium-sized, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicidae, the typical snails.
Shells of two different species of sea snail: on the left is the normally sinistral (left-handed) shell of Neptunea angulata, on the right is the normally dextral (right-handed) shell of Neptunea despecta The shell of a large land snail (probably Helix pomatia) with parts broken off to show the interior structure. 1 – umbilicus
The shell size varies between 10 mm and 20 mm. This shell shows a white or yellowish background with a few transversal black bands and resembles the yellow and black pattern of wasps and bees (hence a common name).
It is evenly white or with brown spots. The shell is less brownish, more slender and higher than the shell of Cochlicella barbara and upper whorls are slightly more rounded in C. acuta (juveniles have a much sharper edge at the periphery of the lowest whorl). The animal is very light yellowish, dorsum with blackish brown pigments, one dark ...
Crepidula plana, common name the eastern white slippersnail, is a species of sea snail, a marine gastropod mollusk in the family Calyptraeidae, the slipper snails or slipper limpets, cup-and-saucer snails, and hat snails. [1] This species is characterized by a flat white shell, a white body, and development that includes a planktotrophic larval ...