Suborder: GAMMARIDEA  Latreille, 1802
Infraorder: Gammarida  Latreille, 1802
Family: Ampeliscidae  Kröyer, 1842
Genus: Haploops Liljeborg, 1856  

Description:

Size: up to 20 mm

Colour: whitish

Head rather short,one pair of corneal lenses

Antenna 1 about half the length of the body, peduncle article 2 much longer and slender than 1; antenna 2 equal to length of 1 in female, longer than body in male

Coxal plate 1 large, broad distally, distal margin rounded and densely setose; two succeeding pairs much smaller, tapering distally; epimeral plate 3 posterodistal angle quadrate or with minute tooth; back broadly rounded, without dorsal setae, in male urosome segment 1 distinctly carinated

Gnathopods poorly subchelate; pereopods 3-4 merus elongate, dactylus equal to length of propodus; pereopods 5-6 carpus longer than two preceding joints combined, dactylus short; pereopod 7 basis narrow, anterior and posterior margins almost parallel, posterior margin slightly concave, distal lobe narrow, ischium, merus and carpus spinose, propodus and dactylus very small; uropod 3 large, reaching well beyond uropods 1 and 2

Telson rounded, cleft far beyond mid-point

Habitat: mud, sandy mud, silt, clay, stones

Mobility:

Feeding: suspension feeder

Distribution: Arctic Ocean, circumpolar, North Pacific, North Atlantic: Greenland, Labrador , Iceland , Spitsbergen, Barents Sea, Kara Sea , Atlantic coast of Europe from Norway to Mediterranean , Adriatic, depths range 10-1525m

Distribution in Svalbard's fjords:

References:

Brandt, A. 1997. Biodiversity of peracarid crustaceans (Malacostraca) from shelf down to the deep Arctic Ocean . Biodiversity and Conservation 6 , pp. 1533-1556.

Bryazgin, V. 1997. Diversity, distribution and ecology of benthic amphipods (Amphipoda, Gammaridea) in the Barents Sea sublittoral. Pol. Polar Res. 18(2), pp. 89-106.

Dauvin, J-C., Bellan-Santini, D. 1990. An overview of the amphipod genus Haploops (Ampeliscidae). J. mar. biol. Ass. U.K. 70., pp. 887-903.

Gurjanova, E. F. 1951. Bokoplavy morjej SSSR I sopredel'nykh vod (Amphipoda - Gammaridea). Akad. Nauk SSSR, Opredel. Faune SSSR 41 ., pp. 321-322.

Lincoln, R. J. 1979. British Marine Amphipoda: Gammaridea. Brit. Mus (Natural History). , pp. 126-127.

Sainte-Marie, B., Brunel, P. 1985. Suprabenthic gradients of swimming activity by cold-water gammaridean amphipod Crustacea over a muddy shelf in the Gulf of Saint Lawrence . Mar. Ecol. Prog. Ser. 23 ., pp. 57-69.

Sars, G. O. 1890-1895. An account of the Crustacea of Norway with short descriptions and figures of all the species, vol. I: Amphipoda., pp. 192-194, pl. 68.

Stephensen, K. 1925. Crustacea Malacostraca. VI (Amphipoda II). Dan. Ingolf Exped. 3 (9) ., pp. 150-151.

Stephensen, K. 1935. The Amphipoda of N. Norway and Spitsbergen with adjacent waters. Tromso Mus. Skr. 3(1) ., pp. 135-137.

Stephensen, K. 1944. The zoology of East Greenland . Amphipoda. Medd. om Gronland . 121 (14)., pp. 49-50.

Węsławski, J. M. 1990. Distribution and ecology of South Spitsbergen coastal marine Amphipoda (Crustacea). Pol. Arch. Hydrobiol. 37 (4). , pp. 503-519.