Kingdom [Animalia] Linnaeus, 1758 - animals
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   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
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     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
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       Subdivision Bilateralia
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         Phylum Echinodermata Bruguière, 1789 - echinoderms
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           Class Echinoidea (Leske, 1778) - sea urchins and sand dollars
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             1 Subclass Perischoechinoidea (M'Coy, 1849)
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             2 Subclass Euechinoidea Bronn, 1860
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