Taxonomic Hierarchy
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| | Kingdom | Animalia
– Animal, animaux, animals |
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| | Subkingdom | Bilateria
– triploblasts |
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| | Infrakingdom | Deuterostomia
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| | Phylum | Chordata
– cordés, cordado, chordates |
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| | Subphylum | Vertebrata
– vertebrado, vertébrés, vertebrates |
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| | Infraphylum | Gnathostomata
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| | Superclass | Chondrichthyes
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| | Class | Chondrichthyes
– cartilaginous fishes, rays, sharks, condrictes, peixe cartilaginoso, tubarão, poissons cartilagineux, raies, requins |
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| | Subclass | Elasmobranchii
– cartilaginous fishes, rays, sharks, skates, torpedoes |
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| | Superorder | Euselachii
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| | Order | Myliobatiformes
– stingrays |
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| | Family | Potamotrygonidae Garman, 1877 – river stingrays |
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Direct Children: |
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| | Genus | Heliotrygon Carvalho and Lovejoy, 2011
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| | Genus | Paratrygon Duméril, 1865
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| | Genus | Plesiotrygon Rosa, Castello and Thorson, 1987
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| | Genus | Potamotrygon Garman, 1877
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