†order Parablastoidea Hudson 1907

Parablastoidea

Parent taxon: Blastozoa according to J. Sprinkle and C. D. Sumrall 2008

See also Beaver et al. 1967, Hudson 1907 and Sepkoski 2002

Sister taxa: Asteroblastida, Blastoidea, Crinoidea, Diploporita, Eocrinoidea, Glyptosphaeritida, Lepidocystoidea, Paracrinoidea, Rhombifera, Rhombifera, Soluta, Sphaeronitida

Subtaxa: Blastocystidae Meristoschisma Pachyocrinus

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Chazyan of Canada (9: Quebec collections), United States (3: New York)

• Whiterockian of United States (6: California, Nevada, Utah)

• Ordovician of Canada (5: Quebec), United States (17: Idaho, Kentucky, Nevada, New York, Tennessee, Utah)

Total: 40 collections including 43 occurrences

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