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 Prionocidaris callista (primary spines) Description Close-up of primary spines: The upper side of the lower shaft is set with distinct thorns which become smaller distally. The underside is more or less smooth, and the collar has white spots. The older spines are overgrown with encrusting organisms.Diameter with spines 240 mm; Sydney Harbour, Australia, 14 m deep.JPG file - 315.94 kB - 1 181 x 1 613 pixelsadded on 2005-02-23217 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha...© 2005 Schultz, Heinke Click here to return to the thumbnails overview |
