(Sars, 1835)
Description:
Body thick, abdomen tapering towards pygidium. Prostomium with a pair of prominent glandular ridges and many eyespots. Gills in two groups; the four gills of each group arranged in two transverse rows in a rhomboid pattern, the inner posterior pair united by a raised flap.
10-23 very large, blunt or pointed golden chaetae on each side in front of gills. (A. gunneri-detail).
Seventeen thoracic segments with notopodia with capillary chaetae, the posterior fourteen also with neuropodia with uncini. Uncini with one row of 4-7 teeth. Fifteen abdominal uncinigerous segments.
Pygidium with two long lateral cirri.
Size:
Over 25 mm.
Tube:
A thin layer of secretion encrusted with a thick, relatively firm layer of mud or clay, usually with plant fragments in a characteristic ringlike pattern.
Colour:
Unknown, but without pigmentation.
Habitat:
Unknown.
Distribution:
Western Norwegian coast, North Sea, English Channel.