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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