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Bruzelius, 1859

Description:
Pereion segment 1 with two tubercles, one behind the other; segment 2 with one or three tubercles, other pereion segments transversely furrowed or each with a pair of spiniform tubercles. Pleosome segments 1 and 2 with a rugose surface or weakly or well-developed tubercles. Coxal plate 1 especially small and widely separated from plate 2; plates 2 to 7 very short and only just contiguous. Head with a single dorsal tubercle; eyes rounded, protruding. Antenna 1 about three-quarters of the body length, ventral margin with many long setae, peduncle article 2 and 3 about equal, article 1 much shorter than article 2, flagellum 3-articulate with article 1 much longer than articles 2 and 3. Antenna 2 as long as or longer than antenna 1, also with long marginal setae, peduncle article 5 longer than article 4, flagellum with one very long article and two or three minute indistinct apical articles. Antennal setae sparsely plumose. Gnathopod 1 small, carpus elongate with a densely setose posterior margin, propodus tapering proximally, palm oblique, convex, setose, posterior margin concave; setae plumose. Female gnathopod 2 very sparsely setose, basis with the anterodistal angle acutely produced, merus also with the distal angle acutely prolonged, propodus robust and broadly oval, palm convex delimited by a small tooth and spine. Male gnathopod 2 basis with a pair of acute processes at the anterodistal angle, merus with a small distal process, propodus very large, elongate, palmar margin with a slender tooth and a broad truncated lobe close to the base of the dactylus; merus and propodus with plumose setae on the posterior margin. Pereiopods moderately slender, basis narrow, dactylus large and robust. Uropod 1 biramous, weakly spinose, outer ramus much shorter than the inner one; uropod 2 reduced to a small rounded plate closely applied to the telson. Telson rounded.

Size:
Up to about 5 mm.

Colour:
Pale yellow.

Habitat:
Depth range from 35 to 900 metres.

Distribution:
North-East Atlantic. North and west Norway, Shetlands, Bay of Biscay; Canary Islands; Mediterranean.

Laetmatophilus tuberculatus