(Bigelow, 1911)
Anterior nectophore with characteristically twisted, serrated ridges. The ventral ridges unite close to the apex. Large, divided and claw-shaped hydroecium. Carrot-shaped somatocyst extending to about half the height of the nectophore. No posterior nectophore is developed. Conical bract with lightly serrated ridges. Large neck shield; shallow hydroecium; thick phyllocyst reaching almost to apex. The gonophore is also characteristically twisted.