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| Kingdom Animalia |
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Acanthoptilum agassizi Kölliker, 1872 -- valid |
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Calibelemnon Nutting, 1908 -- valid |
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Calibelemnon symmetricum Nutting, 1908 -- valid |
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Chunellidae Kükenthal, 1902 -- valid |
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Echinoptilidae Hubrecht, 1885 -- valid |
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Echinoptilum Hubrecht, 1885 -- valid |
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Echinoptilum macintoshi Hubrecht, 1885 -- valid |
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Halipteridae Williams, 1995 -- valid |
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Halipteris Kölliker, 1869 -- valid |
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Halipteris californica (Moroff, 1902) -- valid |
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Halipteris christii (Koren and Danielssen, 1847) -- valid |
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Halipteris finmarchica (Sars, 1851) -- valid |
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Halipteris willemoesi Kölliker, 1870 -- valid |
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Ombellula Cuvier, 1797 -- invalid |
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Ombellulidae -- invalid |
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Ptilosarcus Verrill, 1865 -- valid |
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Umbellula Cuvier, 1797 -- valid |
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Umbellulidae Kölliker, 1875 -- invalid |
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