Cryptosyringida

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 superclass phylum Echinodermata sea urchins and similar organisms Hyponyms superclass Echinoidea class, Holothuroidea class, Ophiuroidea class - classes References Eleutherozoa Echinodermata 1. Smith, A. B. 1984 Classification of the Echinodermata. Palaeontology 27, 431–459. mul Echinoderms