(Leloup, 1933)
Anterior nectophore with a variable number of ridges. Only the 2 ventral ridges are complete, and only 5 ridges reach the apex. The dorso-lateral ridges turn dorsal near their bases and bifurcate. Large mouth plate and hydroecium, which is open ventrally, extends to slightly above ostial level. Short, club-shaped somatocyst. Posterior nectophore and eudoxid stage have not been described.