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]

References

1. Lacaze-Duthiers, H. (1858). Recherches sur la bonellie (Bonellia viridis) (1). Annales des Sciences Naturells, Comprenant la Zoologie, la Botanique, l'Anatomie, et la Physiologie Comparées des Deux Règnes, et l'Histoire des Corps Organisés Fossiles, 4(10), 49–110.
2. Bock, S. (1942). On the Structure and Affinities of Thalassema lankesteri Herdman and the Classification of the Group Echiuroidea. Göteborg: Elanders.
3. de Quatrefages, M. A. (1847). Études sur les types inférieurs de l'embranchment des annelés. Mémoire sur l'Echiure de Gærtner (Echiurus gærtnerii Nob.). Annales des Sciences Naturells, Comprenant la Zoologie, la Botanique, l'Anatomie, et la Physiologie Comparées des Deux Règnes, et l'Histoire des Corps Organisés Fossiles, 3(7), 307–343.
4. Forbes, E. & Goodsir, J. (1841). On the natural history and anatomy of Thalassema and Echiurus. The Edinburgh New Philosophical Journal, Exhibiting a View of the Progressive Discoveries and Improvements in the Science and the Arts, 30, 369–378.
5. Monro, C. C. A. (1927). On the families and genera of the class Echiuroidea. Annals and Magazine of Natural History, 20(120), 615–620.