Diagnosis
provided by World Register of Marine Species
Original diagnosis by Blake & Kudenov (1978: 193): Prostomium with both anterior pointed projection and sub-distal lateral horns. No occipital cirrus. Peristomium reduced, with poorly-developed lateral wings. Proboscis eversible, sac-like. Branchiae from setiger 1, continuing almost to posterior end, basally fused with notopodial lamellae in anterior setigers, becoming nearly free posteriorly. Notopodial lamellae well-developed, entire; neuropodial lamellae well-developed, tending towards bilobate condition in middle setigers. Notosetae all capillaries. Neuropodial setae including capillaries, hooded hooks and inferior sabre-like setae. Nature of pygidium unknown.
