Anterior nectophore not spirally twisted. All ridges complete and serrated basally. Dorsal ridge extended to form basal tooth. Large mouth plate with serrated wings, the left one being larger than the right. Hydroecium truncated apically; somatocyst relatively short and pear-shaped. Posterior nectophore with distinct notch between apex and apical apophysis. Hydroecium open except near apex where 2 hydroecial flaps overlap each other. Large undivided, asymmetric mouth plate with 2 large teeth. Large teeth on ventral ridges about the level of the ostium, also asymmetrically disposed. Bract with serrated ridges and a deep hydroecium. Phyllocyst pear-shaped.