Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Diadema paucispinum (apical system) Description Apical system: The apical system is hemicyclic, the ocular plates II and III are exsert not contacting the peristomial edge.Scale 5 mm. Author Schultz, Heinke JPG file - 59.10 kB - 709 x 653 pixels added on 2011-02-23211 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Schultz, Heinke Click here to return to the thumbnails overview