Classification of Nisiyama 1968

Fm. †Clypeidae Lambert 1898
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G. †Pygurus Agassiz 1839
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Pygurus asiaticus Tokunaga 1903
Pygurus complanatus Tanaka 1965
Fm. Clypeasteridae Agassiz 1836
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G. Clypeaster Lamarck 1801
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Clypeaster humilis Leske 1778
Clypeaster japonicus Döderlein 1885
Clypeaster reticulatus Linnaeus 1758
Clypeaster saipanicus Cooke 1957
Clypeaster virescens Döderlein 1885
Fm. Echinolampadidae Gray 1851
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G. Echinolampas Gray 1825
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Echinolampas alexandri Loriol 1876
Echinolampas bombos Nisiyama 1968
Echinolampas yoshiwarai Loriol 1902
Fm. Fibulariidae Gray 1855
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G. Echinocyamus van Phelsum 1774
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Echinocyamus crispus Mazzetti 1893
Echinocyamus prostratus Nisiyama 1968
G. Fibularia Lamarck
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Subg. †Fibularia (Fibulariella) Mortensen 1948
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Fibularia cribellum Meijere 1904
G. †Sismondia Desor 1858
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Sismondia convexa Nisiyama 1937
Sismondia javana Nisiyama 1968
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Fm. Cassidulidae Agassiz and Desor 1847
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G. Cassidulus Lamarck 1801
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Cassidulus yoshiwarai Loriol 1902
Fm. †Pliolampadidae Kier 1962
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Gitolampas sendaica Nisiyama 1968
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Studeria okinawa Cooke 1954
Echinolampas oviformis Gmelin 1789
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Echinolampas oviformis jacquemonti d'Archiac and Haime 1854