Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Links to other Web sites

(S.I. Smith, 1882)

Description
Rostrum straight, slightly directed upwards, extending beyond antennular peduncle. Length variable from 1/3 to 3/5 of the carapace length. Rostrum with 32-31 dorsal spines, of which 8-10 lie behind the orbit; ventrally there are no spines on the rostrum, but a sereis of plumose setae is present.
Carapace with a marked cervical groove, continuing down- and forwards on both sides of the carapace; anteriorly a dorsal keel is present, becoming obsolete just anterior of the cervical groove. Carapace with supra-antennal and antero-lateral spines.
Eyes pyriform.
Antennular peduncle reaching slightly beyond halfway the antennal scale; antennular flagellum very long.
All pereiopods are very slender, P3-5 of enormous length. P1-4 with slender exopods, decreasing in size from P1 to P4; P5 without exopod.
Abdominal somites laterally compressed, without dorsal keel. Segment 3 somewhat dorso-posteriorly produced, extending over segment 4. Segment 6 strongly laterally compressed, more than twice the length of the fifth segment.
Telson with dorsal sulcus and dorso-laterally beset with 6-7 pairs of short spines. Telson narrowing evenly; apex with three pairs of spines.

Colour
Transparent pinkish white (in life); eyes with traces of red pigment, cornea black.

Size
Maximal body length of E Atlantic specimens 70-80 mm.

Depth range
Mesopelagic; ca. 200-1000 m.

Distribution in the North Sea
Possibly near the entrance of the northern North Sea.

World distribution
N Atlantic (probably with important differences between the W and E Atlantic populations); Mediterranean; N Indian and Pacific Oceans.

Nematocarcinus ensifer