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| Kingdom Animalia |
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Cephalodiscidae Schimkewitsch, 1893 -- valid |
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Cephalodiscus gracilis Harmer, 1905 -- valid |
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Cephalodiscus levinseni Harmer, 1905 -- valid |
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Cephalodiscus sibogae Harmer, 1905 -- valid |
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Enteropneusta Gegenbaur, 1870 -- valid -- acorn worms, acorn-worms, acorn-worms |
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Hemichordata Bateson, 1885 -- valid -- hemichordates, hemicordado |
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Pterobranchia Lankester, 1877 -- valid |
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Rhabdopleura grimaldii Jullien, 1890 -- valid |
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Rhabdopleuridae Harmer, 1905 -- valid |
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