Subgenus Scolelepis Blainville, 1828

Diagnosis of the genus. Prostomium pointed anteriorly, trifid (sagittiform), sometimes truncate, extending posteriorly into caruncle; occipital antennae present or absent. Peristomium well-developed, with or without lateral wings. Palps without ciliated groove, but usually with transverse ciliary bands; basal sheaths weakly developed. Branchiae from chaetiger 2; anterior branchiae complete or partially fused to notopodial lamellae. Hooded hooks in neuropodia present, 0–3 apical teeth above main fang, with straight or falcate shaft; hooks in notopodia present or absent. Pygidium with oval disc or multilobed.