Spinulosida

Spinulosida
Spinulosida
Echinaster sepositus
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Subphylum: Eleutherozoa
Class: Asteroidea
Order: Spinulosida
Perrier, 1884
Families
See text

Spinulosida are an order of sea stars containing at least 120 species.

Spinulosids completely lack pedicellariae and have a delicate skeletal arrangement. Their name comes from the presence of numerous low spines on the aboral (upper) surface.[1] No fossil spinulosids have yet been found.[2]

Taxonomy

  • Family Echinasteridae
    • Genus Echinaster Müller and Troschel, 1840
    • Genus Henricia Gray, 1840
    • Genus Odontohenricia Rowe and Albertson, 1988
    • Genus Poraniopsis Perrier, 1891
    • Genus Stegnaster Sladen, 1889
  • Family Mithrodiidae[3]
    • Genus Mithrodia Gray, 1840
    • Genus Thromidia Pope & Rowe, 1977

References

  1. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 948. ISBN 0-03-056747-5. 
  2. ^ "Asterozoa: Fossil groups: SciComms 05-06: Earth Sciences". Palaeo.gly.bris.ac.uk. 2005-11-22. http://palaeo.gly.bris.ac.uk/Palaeofiles/Fossilgroups/asteroz2/index_f/mod_fm.html. Retrieved 2010-07-30. 
  3. ^ "The World Asteroidea Database - Mithrodiidae". Marinespecies.eu. http://www.marinespecies.eu/asteroidea/aphia.php?p=taxdetails&id=149873. Retrieved 2010-07-30. 
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