Classification of the order Semaeostomatida

Or. Semaeostomeae Agassiz 1862
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Fm. Cyaneidae Agassiz 1862
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G. Cyanea Peron and Lesueur 1809
Fm. Eulithotidae Kieslinger 1939
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G. †Eulithota
Fm. Pelagiidae Gegenbaur 1856
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G. Pelagia Peron and Lesueur 1809
Fm. †Semaeostomitidae Harrington and Moore 1956
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Fm. Ulmariidae Haeckel 1880
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G. Discomedusa Clauss 1877