Genus Chaetozone Chamberlin, 1919

Type Species: Chaetozone setosa Malmgren, 1867

Diagnosis (after Dean & Blake 2007). Prostomium conical, blunt or pointed anteriorly; peristomium elongate to short, with achaetigerous annulations; dorsal tentacles emerging from peristomium or anterior chaetiger; middle body segments sometimes beaded or moniliform; chaetae include acicular spines in neuropodia and usually also in notopodia, sometimes forming posterior cinctures; bidentate spines sometimes present in juveniles or occasionally in posterior chaetigers of adults with unidentate spines in cinctures; pygidium simple lobe, disk-like, or with long, terminal cirrus.