†order Rhombifera Zittel 1879

Rhombifera

Parent taxon: Blastozoa according to S. Zamora et al. 2017

See also Regnéll 1945 and Sepkoski 2002

Sister taxa: Blastoidea, Coronoidea, Diploporita, Eocrinoidea, Felbabkacystidae, Lepidocystidae, Parablastoidea, Paracrinoidea, Rhombifera

Subtaxa: Hemicosmitoida Sumsaricystis

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Silurian of Canada (8: Ontario, Québec collections), United States (50: Arkansas, Illinois, Indiana, Iowa, Missouri, New York, Oklahoma, Tennessee, Wisconsin)

• Niagaran of United States (2: Indiana, Ohio)

• Ordovician of Algeria (1), the Czech Republic (3), Estonia (18), Italy (1), Norway (7), Portugal (2), Spain (4), Sweden (4), Thailand (1), the United Kingdom (7)

• Dawan of China (2)

• Arenig of China (3)

Total: 113 collections including 136 occurrences

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