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List of echinoderm orders

  (Redirected from List of echinodermata orders)

Subphylum CrinozoaEdit

Subphylum AsterozoaEdit

Subphylum EchinozoaEdit

Class Echinoidea (Sea urchins)Edit

 
Strongylocentrotus purpuratus, a well-armoured sea urchin

Class Holothuroidea (Sea cucumbers)Edit

Class OphiocistioideaEdit

No orders recognized: class is divided up into four families, Eucladiidae, Sollasiniidae, Volchoviidae, and Rhenosquamidae. The inclusion of Rhenosquamidae within Ophiocistioidea is doubtful, as the organs identified in fossils of Rhenosquamus as the characteristic "scaly podia" otherwise diagnostic of ophiocistioids may not, in fact, be such structures.

Class HelioplacoideaEdit

No known orders, 2 known species, Helicoplacus curtisi and H. guthi

Subphylum BlastozoaEdit

Class BlastoideaEdit

Class EocrinoideaEdit

Subphylum Homostelea / HomalozoaEdit

Class CtenocystoideaEdit

Class HomoiosteleaEdit

Class HomosteleaEdit

Class StylophoraEdit

ReferencesEdit

  1. ^ "Animal Diversity Web - Echinodermata". University of Michigan Museum of Zoology. Retrieved 26 August 2012.
  2. ^ Sweet, Elizabeth (2005-11-22). "Asterozoa: Fossil groups: SciComms 05-06: Earth Sciences". University of Bristol. Retrieved 2008-05-07.