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Stereocidaris alcocki (primary spines)
Stereocidaris alcocki (primary spines)
Description Primary spines: The basal part of the shaft is formed of three keels, two laterally and one on the upper side. The underside is more or less ridged.
Diameter of test 32 mm; longest spine 81 mm; Indian Ocean.
ZMUC Author Schultz, Heinke JPG file - 170.39 kB - 945 x 1 464 pixels added on 2011-02-23216 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Schultz, Heinke
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