Clypeasteroida (apical systems)
Description Left: The apical system includes presumably only genital plate G2 and very small terminal plates (Clypeaster australasiae). Right: The hydropores lie in a distinct furrow (Laganum laganum). In some groups there are four gonopores, the posterior one being absent. Sometimes the apical disc is star-shaped and the gonopores have shifted into the interambulacra.
Author Schultz, Heinke
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added on 2005-02-23946 viewsERMS taxaScan of drawing Clypeasteroidachecked Kroh, Andreas 2021-02-24From reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha...
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© 2005 Schultz, Heinke