(M. Sars, 1861)
Description: Body cylindrical with 19 chaetigers. The first segments are relatively short, but mostly longer than broad. Prostomium rounded, rim with a notched margin. Nuchal slits semicircular. The seven most anterior segments are bi-annular and as long as prostomium-peristomium. The following segments are much longer than broad, posterior ones again short. First chaetiger enlarged into a collar. Notopodial chaetae are capillaries, on anterior segments they are winged and with long tips; on posterior segments also feathery chaetae present. Hooks present on neuropodia starting on 2nd chaetiger. 1 or 2 posterior segments without chaetae (C. biceps-detail). The three anterior segments with a complete glandular band, the 5 next ones with ventral glandular areas, the rest with glands on neuropodia. Pygidium with oval to rounded anal plate, with deep incisions.
Size: Up to 180 mm for 19 chaetigers.
Tube: Cylindrical and thin. Diameter outside 4-4.5 mm, inside about 2 mm.
Colour: Anterior irregularly dark-brown pigmentation. Posterior paler. In alcohol yellowish with whitish glandular bands.
Habitat: In mud, sometimes in mixed bottoms with sand and shells. The vertical distribution extends from the upper sublittoral, 45 m down to 1000 m deep.
Distribution: Arctic, North Pacific, North Atlantic up to Mediterranean and Adriatic, Northern and middle North Sea, Skagerrak, Kattegat, possibly to eastern Baltic Sea. |