Ascothoracida
| Ascothoracida | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Thecostraca |
| Subclass: | Ascothoracida Lacaze-Duthiers, 1880 [1] |
| Orders and families [2] | |
|
Dendrogastrida Grygier, 1987
Laurida Grygier, 1987
| |
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 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
- ^ "Ascothoracida Lacaze-Duthiers, 1880". Integrated Taxonomic Information System. Retrieved December 8, 2010.
- ^ a b c 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.
- ^ 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.
- ^ J. K. Lowry (October 2, 1999). "Ascothoracida (Thecostraca, Maxillipoda)". Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval. Australian Museum. Retrieved December 31, 2009.
- ^ a b c D. R. Khanna (2004). "Segmentation in arthropods". Biology of Arthropoda. Discovery Publishing House. pp. 316–394. ISBN 978-81-7141-897-8.
External links
Data related to Ascothoracida at Wikispecies
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