(Grube, 1860)
Description:
Prostomium rounded with four eyes with lenses in a trapezoid arrangement and often two ocelli. Palps hardly visible dorsally, with a median groove. Median antenna longer than lateral ones. Lateral antennae up to 6x as long as prostomium.
Dorsal tentacular cirri about as long as lateral antennae, ventral much shorter. Dorsal cirri of first segment as long as median antenna. Dorsal cirri of second segment less than half that size. All other dorsal cirri unequal and irregularly in size and shorter or longer than segment width. Blades of compound chaetae bidentate, secondary tooth as long as terminal tooth. Parapodia with an additional needle shaped chaeta, serrated at the shaft. Pharynx with twist. Trepan with 24-34 fine equal teeth (A. rubropunctatus-detail).
Size:
Body up to 20 mm long for 120 segments.
Colour:
Dorsally, every segment with 4 large red or orange spots.
Habitat:
Down to 100 m deep. Between stones and shells.
Distribution:
North Atlantic up to Mediterranean, English Channel and North Sea.