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(Bate, 1857)

Description:
Female easily confused with Dyopedos monacanthus . Coxal plates very small; plate 2 in male with a spiniform anterodistal process. Head slightly prolonged forwards; eyes large, rounded-oval, protruding. Antenna 1 long and slender, may be moderately robust in male, little longer than the body length, setose, flagellum equal to the length of the peduncle article 3, 5-articulate; accessory flagellum very small, 3-articulate. Antenna 2 two-thirds of the length of antenna 1, slender, densely setose. Gnathopod 1 small, simple, carpus longer than the propodus. Female gnathopod 2 small, carpus triangular, propodus oval and twice the length of the carpus, palmar margin with a single slender median spine, dactylus less than half the length of the propodus. Male gnathopod 2 very large and robust, basis with a large anterodistal lobe, propodus narrow, elongate, palm with a long straight proximal process and a rounded or triangular distal tooth, dactylus large, robust, setose, inner margin sinuous with a small proximal tubercle. Pereiopods 3 and 4 small, basis expanded, oval. Pereiopods 5 to 7 not greatly elongate, carpus spinose, dactylus very small. Uropods 1 and 2 peduncle outer margin and rami margins minutely toothed, spinose; uropod 2 peduncle inner margin with a few short setae; uropods 1 and 2 outer ramus two-thirds of the length of the inner one; uropod 1 rami with a long apical spine. Telson rounded.

Size:
Up to about 6.5 mm.

Colour:
Whitish, with narrow brown bands.

Habitat:
Depth range from 15 to 700 metres, often associated with hydroids and bryozoans.

Distribution:
North Atlantic. American and European coasts; Arctic Ocean. European coasts from northern Norway to the English Channel.

Dyopedos porrectus