Order Siphonophorida

Hydrozoa - Siphonophorida

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

Sister taxa: Actinulida, Delheidia, Fistulella, Graptogeitonia, Hydrocorallinae, Hydroida, Hydroidolina, Kerunia, Lemniscaterina, Likinia, Limnomedusae, Milleporidae, Milleporina, Narcomedusae, Nigriporellidae, Rhizostromella, Roseoporella, Sphaeractinida, Spongiomorphida, Stoliczkiella, Stylasterina, Trachylinida, Tubulariae, Tubuloparietes

Subtaxa: Protolyella Velellidae

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Ecology: nektonic carnivore-suspension feeder

Distribution:

• Triassic of United States (1: Nevada collection)

• Namurian of Egypt (1)

• Devonian of Germany (1), United States (1: Montana)

• Silurian of United States (2: New York)

Total: 6 collections each including a single occurrence

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