Echinacea Temporal range:
Echinus melo
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Infraclass:	Carinacea
Superorder:	Echinacea Claus, 1876
Orders
(See text)

The Echinacea are a superorder of sea urchins. They are distinguished by the presence of a rigid test, with ten buccal plates around the mouth, and solid spines. Unlike some other sea urchins, they also possess gills. The group is a large one, with species found worldwide.

Echinacea are part of Animalia (kingdom), Echinodermata (phylum), Echinozoa (subphylum), Echinoidea (class), Euechinoidea (subclass), Carinacea (infraclass).

Child taxa

According to World Register of Marine Species:^[1]

• Order Arbacioida (Gregory, 1900) -- 1 extant family and 2 fossils
• Order Camarodonta (Jackson, 1912)
  • Infraorder Echinidea (Kroh & Smith, 2010) -- 5 extant families
  • Infraorder Temnopleuridea (Kroh & Smith, 2010) -- 2 extant families and 2 fossils
• Order Stomopneustoida (Kroh & Smith, 2010) -- 2 extant families and 1 fossil
• Family Glyphopneustidae Smith & Wright, 1993 †

• 
  Arbacia lixula,
  an Arbacioida
• 
  Paracentrotus lividus,
  an Echinidea
• 
  Temnopleurus toreumaticus,
  a Temnopleuridea
• 
  Stomopneustes variolaris,
  a Stomopneustoida

References

• Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 980. ISBN 0-03-056747-5.
• Kroh, A.; Smith, A.B. (2010). "The phylogeny and classification of post-Palaeozoic echinoids". Journal of Systematic Palaeontology. 8 (2): 147–212. doi:10.1080/14772011003603556.