Anteriornectophore with 5 sets of from 2 to 4, usually 3, often incomplete longitudinal ridges. Hydroecium extends to ostial level and is open ventrally. Small, club-shaped somatocyst. Mouth plate squarely truncated basally. Posteriornectophore and eudoxid stage have not been described.
Kingdom Animalia Phylum Cnidaria Class Hydrozoa Subclass Siphonophorae Order Calycophorae Family Diphyidae Subfamily Diphyinae Genus Lensia Species Lensia ajax