| Gastropoda Cuvier, 1797 (Class) |
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| Gastropoda Orthogastropoda Ponder & Lindberg, 1996 (Subclass) |
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| Gastropoda Orthogastropoda Opisthobranchia Milne Edwards, 1848 (Superorder) |
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| Acochlidea Odhner, 1939 (Order) |
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| Acochlidea Acochlidioidea Odhner, 1939 (Superfamily) |
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| Acochlidiidae Odhner, 1937 (Family) |
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| Hedylopsidae Odhner, 1952 (Family) |
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| Minicheviellidae Starobogatov, 1983 (Family) |
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| Palliohedylidae Rankin, 1979 (Family) |
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| Pseudunelidae Rankin, 1979 (Family) |
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| Strubellidae Rankin, 1979 (Family) |
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| Tantulidae Rankin, 1979 (Family) |
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| Acochlidea Microhedyloidea Odhner, 1937 (Superfamily) |
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| Asperspinidae Rankin, 1979 (Family) |
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| Livorniellidae Rankin, 1979 (Family) |
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| Microhedylidae Odhner, 1937 (Family) |
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| Pontohedylidae Starobogatov, 1983 (Family) |
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| Sabulincolidae Rankin, 1979 (Family) |
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| Unelidae Rankin, 1979 (Family) |
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