Larval nectophore similar to that of A. acaule, but lateralradial canals are more convoluted where they bend. Flattened vestigialnectophore not embraced by larval one. Nectosac greatly reduced and of characteristic shape. Its ventral canal forms a network on the ventral wall, while the dorsal canal is simple. No lateral canals.
Kingdom Animalia Phylum Cnidaria Class Hydrozoa Subclass Siphonophorae Order Calycophorae Family Prayidae Subfamily Amphicaryoninae Genus Amphicaryon Species Amphicaryon ernesti