Classification of Nielsen 2012
Unr. Metazoa Haeckel 1874
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Unr. Euradiculata Nielsen 2012
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Cl. Calcarea Bowerbank 1864 [calcareous sponge]
Invalid names: Proepitheliozoa Nielsen 2008 [empty]
Invalid names: Silicea [empty]
Unr. †Scalidophora
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Ph. Chaetognatha Leuckart 1854 [arrow worm]
Unr. †Loricifera
Invalid names: Kinorhyncha [empty]