Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Sperosoma quincunciale (apical system) Description Apical system. The line is white encircling the apical system, excluding the ocular plates.Scale 10 mm. Author Mortensen, Theodor JPG file - 138.20 kB - 844 x 832 pixels added on 2011-02-23193 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview