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 | Echinodermata Bruguière, 1791 [ex Klein, 1734]
– echinoderms, échinodermes, bolacha da praia, equinoderma, equinodermata, estrela do mar, ouriço do mar |
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| Subphylum | Echinozoa Haeckel, 1895
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| Class | Echinoidea Leske, 1778
– heart urchins, sand dollars, sea urchins, châtaignes de mer, clypéastres, oursins, bolacha da praia, equinóide, ouriço do mar, heart urchins, sand dollars, sea urchins, urchins |
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| Subclass | Euechinoidea Bronn, 1860
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| Superorder | Echinacea Claus, 1876
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| Order | Echinoida Claus, 1876 |
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Direct Children: |
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| Family |
Echinidae Gray, 1825
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| Family |
Echinometridae Gray, 1825
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| Family |
Parasaleniidae
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| Family |
Strongylocentrotidae Gregory, 1900
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