Echinacea (animal)

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.

Child taxa
According to World Register of Marine Species:
 * 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 †