Data PolicyPublications | Institutes | Persons | Datasets | Projects | Maps IMIS Photogallery » References Tetrapygus niger (ambulacral plates) Description Ambulacral plates: There may be four or five pore-pairs per plate, mixed in one column.Scale 1 mm. Author Mortensen, Theodor JPG file - 99.73 kB - 701 x 1 027 pixels added on 2005-02-23255 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Mortensen, Theodor Click here to return to the thumbnails overview