Diadematacea
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Diadematacia Temporal range: Late Triassic–Recent |
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| Echinothrix diadema | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| Superorder: | Diadematacia |
| Orders | |
Diadematoida
Echinothurioida
Pedinoida
The Diadematacia form a superorder of sea urchins. Unlike most other sea urchins, they generally have hollow spines. The tubercles on their tests are perforated, and most species possess gills.
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