| Hardouinia Temporal range: Late Cretaceous |
|
|---|---|
| Hardouinia florealis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Echinoidea |
| Subclass: | Euechinoidea |
| Order: | Cassiduloida |
| Genus: | Hardouinia |
Hardouinia is an extinct genus of echinoid that lived in the Late Cretaceous. Its remains have been found in North America.