Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Pericosmus akabanus (apical system) Description Apical system: The ocular plates are conspicuously indented in the madreporite. The extension of the madreporite towards the posterior may be variable.Scale 3 mm. Author Mortensen, Theodor JPG file - 27.22 kB - 354 x 312 pixels added on 2009-02-23187 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Mortensen, Theodor Click here to return to the thumbnails overview