Hydrozoa

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

Sister taxa: Actinulida, Chondrophorina, Delheidia, Eoporpita, Fistulella, Graptogeitonia, Hydrocorallinae, Hydroida, Jillua, Lemniscaterina, Likinia, Lovcenipora, Milleporidae, Milleporina, Ovatoscutum, Plumalina, Rhizostromella, Roseoporella, Siphonophorida, Spongiomorphida, Spriggia, Stoliczkaria, Stoliczkiella, Stylasterina, Trachylinida, Tubulariae

Subtaxa: Cycloporidium, Globostroma, Parkeria, Paronaria, Stromactinia

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Ecology: stationary epifaunal carnivore-suspension feeder