Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Strongylocentrotus polyacanthus (ambulacral plates + apical system) Description a. Ambulacral plates, b. Apical system.a. Scale 4 mm; b. Scale 5 mm. Author Mortensen, Theodor JPG file - 112.22 kB - 954 x 472 pixels added on 2011-02-23211 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview