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 | Atelostomata Zittel, 1879
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|   |                         Order | Spatangoida Claus, 1876 – heart urchins, heart urchins | 
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          Direct Children: | 
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 |   |                            Suborder | 
Asterostomatina 
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|   |                            Suborder | 
Hemiasterina A. G. Fischer, 1966
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|   |                            Suborder | 
Holasterina 
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|   |                            Suborder | 
Micrasterina A. G. Fischer, 1966
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|   |                            Suborder | 
Neolampadoida 
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|   |                            Suborder | 
Toxasterina 
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