Genus Capitellethus Chamberlin, 1919

Type species: Capitellides dispar Ehlers, 1907

Diagnosis (after Green 2002). Thorax with 12 segments including an achaetous peristomium and 11 chaetigers. Capillary chaetae in first ten chaetigers, last thoracic segment (chaetiger 11) with either capillary chaetae in both rami or capillary chaetae in notopodia and hooded hooks in neuropodia. Abdominal chaetigers with hooded hooks only; hooded hooks with one or more rows of teeth above the main fang; basal row with two teeth. Abdominal noto- and neuropodia reduced. Branchiae may be present in posterior segments of abdomen.