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(Montagu, 1813)

Pleon segments 1 to 4 each with a large dorsal tooth. Distal angle of epimeral plate 3 with a large tooth. Head with irregular lateral lobes, subacute; eyes large in female, very large in male, white in colour. Antenna 1 peduncle article 1 with a large distoventral tooth, article 2 very long and slender, flagellum slender, multi-articulate. Antenna 2 in female shorter than antenna 1; in male much longer than antenna 1; flagellum very slender; peduncle articles 3 and 4 in male with tufts of short fine setules. Propodus of gnathopod 1 short and broad, palm oblique delimited by a pair of slender spines. Gnathopod 2 longer and more slender than gnathopod 1, palmar structure similar. Basis of pereiopod 5 with an oval posterior lobe, prolonged distally; basis of pereiopod 6 with a broad proximal lobe, emarginate distally; basis of pereiopod 7 oval, posterior lobe narrowing distally. Coxal gills weakly pleated. Rami of uropod 3 twice the length of the peduncle, spinose and with few marginal setae. Telson elongate, cleft almost to the base, each lobe with few dorsolateral spinules.

Up to about 14 mm.

Often very striking, may be red, or red with brown markings, frequently with brilliant white speckles on the body and a few black patches on the pleon and pereiopods.

Depth range from the lower intertidal to about 60 metres; locally common.

North East Atlantic; widespread on all European coasts from northern Norway to the Mediterranean; also Black Sea and North Africa to Senegal; Canaries and Azores.

Dexamine spinosa