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(Sowerby, 1806)

Description:
Body extremely slender and subcylindrical. The segment bearing pereiopod 1 fused with the cephalon. Middle segment (4) of the pereion about twice the length of anterior segments and the cephalon; in female the surface is covered with small tubercles, two of which are conspicuous anteriorly on dorsal surface; in male the surface is smooth and cylindrical. Pereiopods 1 to 4 elongate, very densely setose and directed toward the mouth; pereiopods 5 to 7 short, stout and adapted for clinging.
Female up to 30 mm body length; males up to 10 mm.

Habitat:
There are some intertidal records, presumably of specimens washed up from below tidemarks.

Distribution:
Ranging from northern Norway, east to the Kattegat and southwards to Portugal.

Astacilla longicornis