Echiuroidea

Echiuroidea is an order of annelids in the class Polychaeta.

Echiuroidea
Bonellia viridis (adult female)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Annelida
Clade:	Pleistoannelida
Clade:	Sedentaria
Subclass:	Echiura
Order:	Echiuroidea Fisher, 1946
Suborders
Bonelliida Echiurida

Families

• Suborder Bonelliida
  • Bonelliidae Lacaze-Duthiers, 1858^[1]
  • Ikedidae Bock, 1942^[2]
• Suborder Echiurida
  • Echiuridae de Quatrefages, 1847^[3]
  • Thalassematidae Forbes & Goodsir, 1841^[4]
  • Urechidae Monro, 1927^[5]