Taxonomic Hierarchy
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| Kingdom | Animalia
– Animal, animaux, animals |
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| Subkingdom | Bilateria
– triploblasts |
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| Infrakingdom | Protostomia
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| Superphylum | Spiralia
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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 | Orthogastropoda
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| Infraclass | Heterobranchia
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| Superorder | Stylommatophora
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| Order | Helicida
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| Suborder | Helicina
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| Infraorder | Rhytidoidei
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| Superfamily | Rhytidoidea Pilsbry, 1893
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| Family | Megomphicidae H. B. Baker, 1930
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| Genus | Polygyroidea Pilsbry, 1930 |
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Direct Children: |
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| Species | Polygyroidea harfordiana (J. G. Cooper, 1870)
– toothed coin | |
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