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Phylum: Echinodermata (starfish,
brittle stars, sea urchins, sea cucumbers, crinoids)
Life >
Eukaryotes
>
Opisthokonta >
Metazoa
(animals) > Bilateria > Deuterostomia > Ambulacraria
Classification
Stelleroidea (starfish
and brittle stars)
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Asteroidea (starfish)
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Ophiuroidea (brittle stars)
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Echinoidea (sea urchins, heart urchins and sand dollars)
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Holothuroidea (sea cucumbers)
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Crinoidea (crinoids)
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