Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Stylocidaris brevicollis (apical disc + secondary spine) Description Left: Part of apical disc: The tubercles on the outer edge of the genital plates are enlarged. Right: Secondary spine: The distal end is rounded and bevelled like a chisel.Left: Scale 5 mm. Right: Scale 2 mm. Author Mortensen, Theodor JPG file - 82.65 kB - 827 x 404 pixels added on 2011-02-23205 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor Click here to return to the thumbnails overview