Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Heterocentrotus trigonarius (ambulacral plates) Description a. Ambulacral plates at the peristomial edge: The pore zones are strongly widened.Scale 2 mm. Author Mortensen, Theodor JPG file - 193.23 kB - 1 156 x 679 pixels added on 2005-02-23288 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview