Ophiacanthida includes 37 children:
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Clarkcomidae O'Hara, Stöhr, Hugall, Thuy & Martynov 2018
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Ophiacanthida incertae sedis
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Ophiacanthidae
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Ophiacanthidae Ljungman 1867
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Ophiacanthina O'Hara, Hugall, Thuy, Stöhr & Martynov 2017
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Ophiobyrsidae
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Ophiobyrsidae Matsumoto 1915
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Ophiocamacidae
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Ophiocamacidae O'Hara, Stöhr, Hugall, Thuy & Martynov 2018
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Ophiocomidae Ljungman 1867
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Ophiocomoidea Ljungman 1867
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Ophiodermatidae
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Ophiodermatidae Ljungman 1867 (ophiodermatid brittle stars)
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Ophiodermatoidea Ljungman 1867
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Ophiomyxidae
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Ophiomyxidae Ljungman 1867
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Ophiopezidae O'Hara, Stöhr, Hugall, Thuy & Martynov 2018
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Ophiopteridae O'Hara, Stöhr, Hugall, Thuy & Martynov 2018
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Ophiotomidae
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Ophiotomidae Paterson 1985
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