Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Diadema setosum (apical system) Description Apical system: Traces of the blue spots are shown as stippled patches between the gonopores (in solid black) and the edge of the peristome.Scale 2 mm. Author Mortensen, Theodor JPG file - 112.78 kB - 1 016 x 1 019 pixels added on 2005-02-23613 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview