Totton, 1941
Anterior nectophore with 7 straight longitudinal ridges. The dorso-lateral ridges do not reach the ostium, while the ventro-laterals, which basally form the margins of the mouth plate, do not reach the apex. Oblique mouth plate, occupied by hydroecium, which lies below the ostium and is open ventrally. Short, usually bilobed somatocyst borne on short stalk. Posterior nectophore and eudoxid stage have not been described.