apical system
From ZooTerms (Dictionary of Invertebrate Zoology)
Revision as of 23:34, 13 September 2013 by Andreas Plank (Talk | contribs) (1 revision: import_simple_(-definition))
apical system also coronal system: (Echinodermata: Echinoidea) Plates surrounding the body organs of sea-urchins, found at the dorsal or aboral pole of the test.
