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(Boeck, 1861)

Description:
Body slender, smooth. Coxal plates 1-3 posterodistal angle with distinct tooth. Epimeral plate 3 posterodistal angle with small tooth, posterior margin convex. Head with short rostrum, lateral lobes triangular; eyes large, oval, dark red in colour. Antenna 1 slender, about two-thirds body length, peduncle article 1 much longer than 2-3 combined and with ventrodistal angle acute, flagellum about three times length of peduncle. Antenna 2 much shorter than 1, peduncle articles 4-5 subequal, flagellum little longer than peduncle. Gnathopods only moderately large; gnathopod 2 slightly larger than 1. Gnathopod 1, merus rounded distally, setose, carpus with short setose posterior lobe, propodus elongate oval, palm delimited by 2 groups of large spines, palmar margin with small rounded tooth at mid-point. Gnathopod 2 generally similar to 1 except merus acute distally and carpal lobe more prolonged. Pereopods slender, weakly spinose; pereopod 7 basis broadly expanded, posterior margin distinctly serrate. Uropod 3 outer ramus about three-quarters length of inner ramus. Telson triangular, apex rounded.

Size:
Up to 6 mm.

Colour:
Variable, often whitish with reddish brown patches.

Habitat:
Depth range from 5 to 150 metres, usually on rocky coasts.

Distribution:
Arctic Ocean; North Atlantic, American and European coasts; north and west Norway, widely recorded; southerly recorded limit in eastern Atlantic is Bay of Biscay.

Source: Lincoln, 1979.

Pleusymtes glaber