Description
The shell is glossy and lemon-shaped, with 20-30 transverse ridges. The upper part of the shell is a uniform very pale brown in color; there are no pigment spots present on the shell, but sometimes there are dots on the mantle of the animal.
The shell length is up to a maximum of about 10 mm and a width of about 8 mm.
The mantle is covered with many papillae. It has a light colour in deeper waters, but becomes darker between tide marks. The foot is light yellow or light orange. The admedian teeth of the radula have denticles. The penis is flat and broad.
The larvae have a light stomach and intestine. In the veliger stage they have a four-lobed velum (a structure used for swimming and particulate food collection) with very long lobes.
Read more about this topic: Trivia Arctica
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