Generally very similar to Harpinia antennaria especially the male; pleon segments setulose dorsally in female. Coxal plates 1 to 3 posterodistal angle with a small tooth, distal margin with only few plumose setae. Posterodistal angle of epimeral plate 3 with a moderately large tooth; in male the epimeral tooth quite small. Rostral hood with a large tooth on the lateral margin. Antenna 1 peduncle article 1 very large, much longer than 2 and 3 combined, flagellum about 6-articulate; accessory flagellum 5-articulate. Antenna 2 flagellum about 6-articulate. Gnathopod 1 and 2 generally similar except 2 slightly smaller than 1 and more slender; in female propodus oval with palm convex delimited by acute process and slender spine; in male propodus more slender than in female, palm weakly concave; gnathopod 1 palm not delimited, gnathopod 2 palm delimited by slender spine. Pereiopods 3 and 4 robust, setose. carpus oval with long spines on posterodistal margin. Pereiopod 5 basis slender, merus, carpus and propodus moderately setose. Pereiopod 6 in female very elongate, robust and strongly spinose, propodus slender and spiniform; male pereiopod 6 only weakly spinose. Pereiopod 7 basis, posterior margin in female with about 5 to 7 large teeth; in male posterior margin only feebly crenulate. Uropod 3 in female outer ramus sparsely spinulose, inner ramus equal to length of article 1 of outer ramus; male uropod 3 elongate, naked, inner ramus slightly shorter than outer. Telson short, rounded, deeply cleft.
Up to 6 mm.
Depth range from 20 to 600 metres; often found with Harpinia antennaria .
North East Atlantic; North Sea; European coasts from northern Norway to west Africa and west Mediterranean.