Classification of Boardman and Cheetham 1987

Or. Cheilostomata Busk 1859
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Subor. Anasca Levinsen 1909
Subor. Ascophora Levinsen 1909
Subor. Cribrimorpha Lang 1916
Unr. Animalia Linnaeus 1758
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Ph. Bryozoa Ehrenberg 1831 [bryozoan]
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Cl. Gymnolaemata Allman 1856
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Or. Ctenostomata Busk 1852
Cl. Phylactolaemata Allman 1856 [freshwater bryozoan]
Cl. Stenolaemata Borg 1926
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Or. †Cryptostomata Vine 1884
Or. †Cystoporata Astrova 1964
Or. †Fenestrata Elias and Condra 1957
Or. †Trepostomida Ulrich 1882
Invalid names: Tubuliporata [empty]