Histology of the globiferous pedicellariae of Psammechinus miliaris (Echinodermata: Echinoidea)


  • Fu-Shiang Chia

    1. Dove Marine Laboratory and Department of Zoology, University of Newcastle upon Tyne
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    • *Department of Zoology, University of Alberta, Edmonton, Alberta.


The general morphology, function and histology of the globiferous pedicallariae of the regular sea-urchin, Psammechinus miliaris are described. There is a ganglion under the sensory epidermis on the inner surface of each jaw. This is the first discovery of a ganglion in any echinoid.

The regeneration of globiferous pedicellariae in laboratory conditions takes 25 to 40 days.