Cryptosyringida
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Translingual
Etymology
The cryptosyringids owe their name to the fact that their radial water vascular system and radial nerve become covered during development, a trait that was viewed as a synapomorphy of the group (1).
Proper noun
Cryptosyringida
- A taxonomic superclass within the phylum Echinodermata – sea urchins and similar organisms.
Hyponyms
- (superclass): Echinoidea, Holothuroidea, Ophiuroidea - classes
References
Eleutherozoa on Wikipedia.Wikipedia 
Cryptosyringida on Wikispecies.Wikispecies 
Category:Echinodermata on Wikimedia Commons.Wikimedia Commons
- 1. Smith, A. B. 1984 Classification of the Echinodermata. Palaeontology 27, 431–459.