(Rathke, 1843)
Description:
Body long and slender.
Prostomium semicircular, broader than long, with four eyes in a trapezoid arrangement and with or without two ocelli. Anterior pair of eyes larger than posterior pair. Palps oval, longer than the prostomium, totally separate. 3 antennae: one pair lateral ones and a median one. Lateral antennae longer than palps, with about 15 rings. Median antenna longer, with up to 30 rings.
Tentacular cirri annulated. Dorsal tentacular cirri about as long as lateral the antennae; ventral ones shorter.
Dorsal cirri alternating, longer and shorter, with 11-40 rings. Ventral cirri finger-like, without rings, as long as the parapodial lobes, posteriorly becoming shorter.
Compound chaetae with shorter and one or two long blades. Long blades two to four times as long as the shorter ones, all are finely serrate and bidentate (T. cornuta-chaetae). Posterior parapodia dorsally and ventrally also with a simple bidentate chaeta.
Proboscis long, with one large tooth anteriorly.
Two pygidial cirri and a little tail.
Size:
Up to 45 mm for over 100 segments.
Colour:
Living animal yellowish, grey wit reddish banding or rust red.
Habitat:
In sand and mud, between stones, shells and sponges, down to 3000 m.
Distribution:
World-wide, Atlantic to English Channel, Kattegat, Skagerrak and Öresund.