†family Pyrgocystidae Kesling 1967

Edrioasteroidea - Pyrgocystidae

Parent taxon: Edrioasteroidea according to C. D. Sumrall and S. Zamora 2011

Sister taxa: Aragocystites, Cyathocystida, Cyathothecidae, Edrioasterida, Edrioblastoida, Hemicystitidae, Isorophida, Isorophina, Isorophinidae, Kailidiscus, Stromatocystitida, Stromatocystitidae

Subtaxa: Archaepyrgus Argodiscus Belochthus Epipaston Fanulodiscus Moroccopyrgus Pyrgocystis Streptaster

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Type: Pyrgocystis

Ecology: stationary low-level epifaunal suspension feeder

Distribution:

• Devonian of Germany (1 collection), Morocco (1)

• Silurian of Australia (1), Canada (1: Ontario), Sweden (3), United States (3: Iowa, New York)

• Ordovician to Silurian of United States (1: Illinois)

• Ordovician of Morocco (7), the United Kingdom (1), United States (24: Illinois, Illinois, Iowa, Iowa, Iowa, Illinois, Minnesota, Ohio, Oklahoma, Tennessee)

Total: 43 collections including 47 occurrences

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