Hydrozoa - Hydroida

Parent taxon: Hydroida according to J. J. Sepkoski 2002

Sister taxa: Archaeoantennularia, Archaeocryptolaria, Archaeolafoea, Archaeonectris, Calyptoblastina, Cambrohydra, Clyxhydra, Crucimedusina, Discophyllum, Drevoella, Flexihydra, Inocaulis, Kristinella, Lafoeidae, Mazohydra, Mesokylix, Palaeacmea, Palaelophacmaea, Palaeokylix, Palaeonectris, Palaeotuba, Parleria, Philippinactinia, Plectodiscus, Pontifennia, Protohalecium, Protulophila, Psammactinia, Rhabdohydra, Sphenoecium, Thecata

Subtaxa: none

Ecology: stationary epifaunal carnivore-suspension feeder