Cryptosyringida Definition
pronoun
A taxonomic superclass within the subphylum Eleutherozoa — the sea urchins and similar organisms.
Wiktionary
Origin of Cryptosyringida
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).
From Wiktionary
1. Smith, A. B. 1984 Classification of the Echinodermata. Palaeontology 27, 431–459.
From Wiktionary
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