(Bate and Westwood, 1861)
Coxal plates elongate; epimeral plate 3 posterodistal angle forming a very large tooth. Head with a prominent lateral lobe, triangular, apex subacute; eyes large, oval. Antenna 1 peduncle article 1 only moderately large, articles 2 and 3 compressed, flagellum slender and about 18-articulate in female, flagellum in male much longer and up to 30-articulate, article 1 of the flagellum large and setose; accessory flagellum 5-articulate. Antenna 2 in female equal in length to antenna 1, flagellum about 15-articulate, in male exceeding the body length and very slender, flagellum filiform; Antenna 1 and 2 in male with calceoli. Gnathopod 1 slender, propodus shorter than the carpus, narrowly rectangular, palm oblique delimited by a large spine, dactylus with a tooth on the inner margin, palmar margin minutely toothed. Gnathopod 2 propodus a little shorter than the carpus, minutely subchelate. Pereiopods 3 and 4 conspicuously setose; pereiopods 6 and 7 elongate, propodus long and narrow, dactylus straight and very slender. Uropod 2 inner ramus with a distinct constriction marked by a large spine; uropod 3 rami spinose, inner ramus only slightly shorter than the outer one, inner margins with few setae. Telson cleft to three-quarters of its length, each lobe with three long lateral spinules and a small group of apical spinules.
Up to about 12 mm.
Depth range from 5 to 200 metres, occasionally recorded down to 1200 metres: locally common.
Arctic Ocean; North-East Atlantic: North Sea; European coasts from northern Norway to the Mediterranean; Canary Islands, Rockall.