Suborder Calyptoblastina Allman 1871
Parent taxon: Hydroida according to B. M. Waggoner and M. R. Langer 1993
Sister taxa: Archaeonectris, Cambrohydra, Chondrophorina, Clyxhydra, Drevotella, Flexihydra, Gymnoblastina, Inocaulis, Lafoeidae, Mazohydra, Palaeacmea, Palaeonectris, Parleria, Pontifennia, Protulophila, Psammactinia, Rhabdohydra, Thecata
Subtaxa: Archaeoantennularia Campanulariidae Hydrallmania Kristinella Mesokylix Palaeokylix Palaeotuba Protohalecium Sphenoecium
Ecology: stationary epifaunal carnivore-suspension feeder
Distribution:
• Cretaceous of the Netherlands (1 collection), United States (1: Mississippi)
• Cambrian of United States (2: Utah)
Total: 4 collections each including a single occurrence