Irregularia
| Irregularia Temporal range: | |
|---|---|
| Echinocardium cordatum | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| Infraclass: | Irregularia Latreille, 1825 |
| Superorders | |
|
Atelostomata | |
Irregularia is an extant infraclass of sea urchins that first appeared in the Lower Jurassic.
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