| Hemipneustidae | |
|---|---|
 | |
| Fossils of Toxopatagus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Order: | Holasteroida |
| Family: | † Hemipneustidae Lambert, 1917 |
Hemipneustidae is an extinct family of sea urchins. [1] [2]
