Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Plococidaris verticillata (aboral) Description Aboral side: The primary spines show the very characteristic whorls, one above the other.Test diameter 23 mm; Siquijor, Philippines. Author Schultz, Heinke JPG file - 145.64 kB - 1 057 x 1 021 pixels added on 2005-02-23387 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke Click here to return to the thumbnails overview