Classification of Fay and Wanner 1967

Cl. †Blastoidea Say 1825 [blastoid]
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Or. †Fissiculata Jaekel 1918
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Fm. †Phaenoschismatidae Etheridge, Jr. and Carpenter 1886
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G. †Decaschisma Fay 1961
G. †Deltoschisma Fay 1961
G. †Dipteroblastus Wanner 1940
G. †Hadroblastus Fay 1962
G. †Hyperoblastus Fay 1961
G. †Microblastus Eykeren 1942
G. †Notoblastus Brown 1941
G. †Nymphaeoblastus Von Peetz 1907
G. †Phaenoschisma Etheridge and Carpenter 1882
G. †Pleuroschisma Reimann 1945
G. †Sphaeroschisma Wanner 1924
G. †Sundablastus Wanner 1924
Fm. †Codasteridae Etheridge, Jr. and Carpenter 1886
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G. †Heteroschisma Wachsmuth 1883
G. †Indoblastus Wanner 1924