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Threeline Mudsnail
Species

Threeline Mudsnail

Ilyanassa trivittata, (Say, 1822)

marine

About Threeline Mudsnail

Ilyanassa trivittata, common name the threeline mud snail, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.

Appearance

(Original description) The shell is conic and acute, appearing yellowish-white. It is cancellate, which causes it to appear granulated, with prominent, equidistant granules. There are ten revolving impressed lines on the body whorl, and a somewhat more conspicuous groove near the summit of each whorl. The spire is as long as or longer than the body, and features a rufous revolving line near the suture.

The body whorl is trilineate with rufous lines, the lines being placed one near the suture, one on the middle, and the third, rather darker, at the origin of the beak. The suture is regular and deeply impressed. The beak is distinguished by a profound depression from the body whorl and is slightly reflected.

Habitat

This marine species occurs in the Northwest Atlantic Ocean off Canada (Gulf of Saint Lawrence, Bay of Fundy)

Where to see it

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