Ascothoracida

Ascothoracida is a small group of crustaceans, comprising around 100 species.[3] They are found throughout the world, and are parasites on cnidarians and echinoderms.[4]

Ascothoracida
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Class: Maxillopoda
Subclass: Thecostraca
Infraclass: Ascothoracida
Lacaze-Duthiers, 1880 [1]
Orders and families [2]

Dendrogastrida Grygier, 1987

  • Ascothoracidae Grygier, 1987
  • Ctenosculidae Thiele, 1925
  • Dendrogastridae Gruvel, 1905

Laurida Grygier, 1987

  • Lauridae Gruvel, 1905
  • Petrarcidae Gruvel, 1905
  • Synagogidae Gruvel, 1905

Ascothoracida was previously ranked as an order within the infraclass Cirripedia (barnacles), but now considered a separate infraclass.[2] Those two infraclasses, along with Facetotecta, together make up the subclass Thecostraca.[2]

The thorax has six pair of biramous appendages, while the abdomen has four segments and a terminal telson with a caudal furca.[5] This arrangement is similar to that seen in copepods.[5] In addition, there is a bivalved carapace, which is expanded in females.[5]

References
  1. "Ascothoracida Lacaze-Duthiers, 1880". Integrated Taxonomic Information System. Retrieved December 8, 2010.
  2. Joel W. Martin & George E. Davis (2001). An Updated Classification of the Recent Crustacea (PDF). Natural History Museum of Los Angeles County. pp. 132 pp.
  3. Paul Schmid-Hempel (2011). "The diversity and natural history of parasites". Evolutionary Parasitology: the Integrated Study of Infections, Immunology, Ecology, and Genetics. Oxford University Press. pp. 18–51. ISBN 978-0-19-922949-9.
  4. J. K. Lowry (October 2, 1999). "Ascothoracida (Thecostraca, Maxillipoda)". Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval. Australian Museum. Archived from the original on May 1, 2012. Retrieved December 31, 2009.
  5. D. R. Khanna (2004). "Segmentation in arthropods". Biology of Arthropoda. Discovery Publishing House. pp. 316–394. ISBN 978-81-7141-897-8.


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