Prostomium bilobed, caruncle to end chaetiger 3. 2 pairs of eyes arranged in trapezoid. In life dark pigment along the lateral margins of the prostomium, dark patches on the peristomium and at the base of the notopodial lobes of chaetigers 1 – 4; smaller, lighter spots on chaetigers 5 & 6. Some pigmentation around mouth and along anterior mid-ventral line. Palps with dark bands. No notochaetae on chaetiger 1. Modified spines of chaetiger 5 slightly curved with small accessory tooth in concave side. Hooded hooks start on chaetiger 7, up to 10. Sometimes accompanied by fine companion chaetae. Branchiae start on chaetiger 7, last 5 chaetigers abranchiate; don’t touch along mid-dorsum. Pygidium saucer-shaped.
38 mm for 193 chaetigers
Bores into shell of scallop, Pecten sulcicostatus.
South Africa; only in False Bay.
Identity in dispute, needs clarification, molecular evidence confirms alien status.