Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Echinosigra phiale (aboral) Description Aboral side. The apical system with the two gonopores is positioned at the extreme anterior edge. There is a distinct keel along the aboral and oral midline.Length 40 mm; Bay of Biscay. Author Schultz, Heinke JPG file - 191.85 kB - 2 343 x 709 pixels added on 2009-02-23649 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Schultz, Heinke Click here to return to the thumbnails overview