Taxonomic Hierarchy
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| Kingdom | Animalia
– Animal, animaux, animals |
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| Subkingdom | Bilateria
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| Infrakingdom | Protostomia
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| Superphylum | Lophozoa
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| Phylum | Mollusca
– mollusques, molusco, molluscs, mollusks |
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| Class | Gastropoda Cuvier, 1797
– gastropods, slugs, snails, escargots, gastéropodes, limaces, caracol, caramujo, lesma |
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| Subclass | Opisthobranchia Milne-Edwards, 1848
– opisthobranchs |
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| Order | Cephalaspidea P. Fischer, 1883
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| Family | Retusidae Thiele, 1926
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| Genus | Volvulella Newton, 1891 |
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Direct Children: |
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| Species | Volvulella acuminatus Bruguiere, 1792
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| Species | Volvulella californica Dall, 1919
– California spindle-bubble | |
| Species | Volvulella catharia Dall, 1919
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| Species | Volvulella cylindrica (Carpenter, 1864)
– cylindrical spindle-bubble | |
| Species | Volvulella panamica Dall, 1919
– Panamic spindle-bubble | |
| Species | Volvulella paupercula (Watson, 1883)
– spineless spindle-bubble | |
| Species | Volvulella persimilis (Morch, 1875)
– southern spindle-bubble | |
| Species | Volvulella recta (Morch, 1875)
– spined spindle-bubble | |
| Species | Volvulella texasiana Harry, 1967
– Texas spindle-bubble | |
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