Diadematidae | |
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Diadema setosum in Oman. | |
Scientific classification | |
Kingdom: | Animalia
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Phylum: | Echinodermata
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Class: | Echinoidea
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Subclass: | Euechinoidea
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Superorder: | Diadematacea
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Order: | Diadematoida
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Family: | Diadematidae Gray, 1855
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The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow.
Like other sea urchins diadematids are sensitive to touch, light, and chemicals; additionally they do have eyes (eye spots) which is in contrast to other sea urchins. Because of this they can follow a threat with their spines.
Astropyga radiata.
Centrostephanus longispinus.
Chaetodiadema granulatum
Diadema setosum.
Echinothrix calamaris.