The Forcipulatida are an order of sea stars, containing three families and 49 genera.
| Forcipulatida | |
|---|---|
| |
| Asterias rubens | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Superorder: | Forcipulatacea |
| Order: | Forcipulatida |
| Families | |
|
See Text | |
Description
editForcipulatids share with the brisingid sea stars distinctive pedicellariae, consisting of a short stalk with three skeletal ossicles. Unlike that group, however, the forcipulatids tend to have more robust bodies.[1] The order includes some well-known species, such as the common starfish, Asterias rubens. This order can be commonly found from North Carolina in the United States all the way to Santos in Brazil.[2]
Phylogeny
editThe order is divided into three families:[3]
- Family Asteriidae — 39 genera
- Family Heliasteridae — two genera
- Family Zoroasteridae — eight genera
World Register of Marine Species gives another taxonomy, with 7 families and 64 genera:
- Family Asteriidae Gray, 1840
- Family Heliasteridae Viguier, 1878
- Family Pedicellasteridae Perrier, 1884
- Family Pycnopodiidae Fisher, 1928
- Family Stichasteridae Perrier, 1885
- Family Zoroasteridae Sladen, 1889
A 2020 study involving phylogenetic analysis and scanning electron microscopy of the skeleton and ossicles of taxa from the superorder Forcipulatacea recovered Asteriidae, Stichasteridae, Zoroasteridae, and Brisingida as monophyletic.[4]
The extinct family Terminasteridae has also been placed in this order.[5]
See also
editReferences
edit- ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 948. ISBN 0-03-056747-5.
- ^ Pazoto, C. P., Ventura, C., Duarte, M., & Silva, E. (2018). Genetic variation and population homogeneity of the sea star Coscinasterias tenuispina (Forcipulatida: ASTEROIDEA) on the coast of Rio de Janeiro, Brazil. Latin American Journal of Aquatic Research, 46(2), 355-363. doi:10.3856/vol46-issue2-fulltext-11
- ^ McKnight, D.G. (2006). Marine Fauna of New Zealand: Echinodermata: Asteroidea (sea-stars). 3. Orders Velatida, Spinulosida, Forcipulatida, Brisingida with addenda to Paxillosida, Valvatida. NIWA Biodiversity Memoir 120: 1-187.
- ^ Fau, Marine; Villier, Loïc (2020). "Comparative anatomy and phylogeny of the Forcipulatacea (Echinodermata: Asteroidea): insights from ossicle morphology". Zoological Journal of the Linnean Society. 189 (3): 921–952. doi:10.1093/zoolinnean/zlz127.
- ^ Ewin, Timothy A. M.; Gale, Andrew S. (September 2020). "Asteroids (Echinodermata) from the Barremian (Lower Cretaceous) of the Agadir Basin, west Morocco". Journal of Paleontology. 94 (5): 931–954. doi:10.1017/jpa.2020.20. ISSN 0022-3360.
Further reading
edit
- Mah, C. & D. Foltz. (2011). Molecular Phylogeny of the Forcipulatacea (Asteroidea: Echinodermata): systematics and biogeography. Zoological Journal of the Linnean Society 162(3): 646-660
- Sladen, W.P. (1889). Report on the Asteroidea. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-1876, Zoology 30(51): xlii + 893 pages 118 plates.
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