Bigelow, 1911
Only a single, asymmetrical large definitive nectophore, which bears a vague pattern of ridges. Eudoxid stage resembles nectophore, and a special nectophore may be present. Smaller larval nectophore also bears ridges, which are spinose in the genus Nectopyramis.
Genus Nectadamas
Genus Nectopyramis