Holasteroida
| 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.