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 | Squaliformes Compagno, 1973
– dogfish sharks |
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| Family | Dalatiidae Grey, 1851
– sleeper sharks, kitefin sharks, laimargues, tiburones carochos |
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| Genus | Squaliolus Smith and Radcliffe in Smith, 1912
– spined pygmy sharks |
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| Species | Squaliolus laticaudus Smith and Radcliffe in Smith, 1912 – spined pigmy shark |
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