Anteriornectophore with undivided mouth plate. Deep hydroecium extending to two-thirds the height of the nectophore, and having characteristic flaps. Somatocyst expanded only in its apical half. The posteriornectophore and eudoxid stage have not been described.
Kingdom Animalia Phylum Cnidaria Class Hydrozoa Subclass Siphonophorae Order Calycophorae Family Clausophyidae Genus Clausophyes Species Clausophyes laetmata