| Holasteroida Temporal range:
| |
|---|---|
| |
| Pourtalesia wandeli | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| Infraclass: | Irregularia |
| Superorder: | Atelostomata |
| Order: | Holasteroida Durham & Melville, 1957 |
Holasteroida is an order of irregular sea urchins.