Holasteroida

Holasteroida Temporal range: Early Cretaceous–recent PreꞒ Ꞓ O S D C P T J K Pg N

Fossil of Hemipneustes pyrenaicus
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Superorder:	Atelostomata
Order:	Holasteroida Durham & Melville, 1957

Holasteroida is an order of sea urchins.

List of families

Family Hemipneustidae (Lambert, 1917) †
- genus Hemipneustes L. Agassiz, 1835 †
- genus Medjesia Jeffery, 1997 †
- genus Opisopneustes Gauthier, 1889 †
- genus Plesiohemipneustes Smith & Wright, 2003 †
- genus Toxopatagus Pomel, 1883 †
Sub-order Meridosternata (Lovén, 1883)
- Infra-order Cardiasterina †
  - Family Cardiasteridae Lambert, 1917 †
  - Family Stegasteridae Lambert, 1917f †
- Family Echinocorythidae Wright, 1857 †
- Family Holasteridae Pictet, 1857 †
  - Genus Salvaster Saucède, Dudicourt & Courville, 2012 †
- Infra-order Urechinina
  - Family Calymnidae Mortensen, 1907
  - Family Carnarechininae Mironov, 1993
  - Family Corystusidae Foster & Philip, 1978
  - Family Plexechinidae Mooi & David, 1996
  - Family Pourtalesiidae A. Agassiz, 1881
  - Family Urechinidae Duncan, 1889
Family Pseudholasteridae (Smith & Jeffery, 2000) †
- genus Eoholaster Solovjev, 1989 †
- genus Giraliaster Foster & Philip, 1978 †
- genus Pseudholaster Pomel, 1883 †
- genus Taphraster Pomel, 1883 †
Family Stenonasteridae (Lambert, 1922) †
- genus Stenonaster Lambert, 1922 †