Family Abraciidae
This family regroups the European black sea-urchin and its relatives.

Family Diadematidae
This family regroups the Diadem urchins and their relatives.

Astropyga radiata – Star urchin
Diadema setosum – Diadem urchin
Echinothrix calamaris – Double-spined urchin

Family Cidaridae
This family regroups the Cidaris (or Pencil) urchins.

Cidaris cidaris – Long-spined slate pen sea-urchin
Eucidaris metularia – Ten-lined urchin
Eucidaris tribuloides – Slate pencil urchin

Family Echinometridae
This family regroups the Rock urchin species.

Echinometra mathaei – Rock-boring urchin

Family Echinidae
This family regroups the Round edible sea-urchin and its relatives.

Echinus esculentus – European edible sea urchin

Family Strongylocentridae
This family regroups the Giant red urchin and its relatives.

Family Temnopleuridae
This family regroups the Smoking urchin and its relatives.

Salmacis bicolor – Two-tone salmacis urchin

Family Parechinidae
This family regroups the Short-spined sea-urchins and other related species.

Family Toxopneustidae
This family regroups the Parsons’ hat sea urchin and its relatives.