Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Parasalenia gratiosa (apical system) Description Apical system: The genital plates project into the interambulacra. There are few periproctal plates.Scales 2 mm. Author Mortensen, Theodor JPG file - 57.09 kB - 709 x 851 pixels added on 2005-02-23241 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview