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IMIS Photogallery » Echinodermata (echinoderms) » Echinoidea (sea urchins)
Tetrapygus niger (apical system)
Tetrapygus niger (apical system)
Description Apical system: Four large anal plates cover the peroproct.
Scale 3 mm. Author Schultz, Heinke JPG file - 144.63 kB - 1 003 x 1 026 pixels added on 2005-02-23232 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke
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