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Heterocentrotus mamillatus (aboral)

Description Close-up of the upper side: The secondary spines are very short and distally thickened and truncated. The uppermost ambulacral primary spines have the same shape, and the apical disc is also densely covered by these short spines. They serve to protect the test against heavy wave-surge, offering little resistance to the water currents. Author Schultz, Heinke JPG file - 346.78 kB - 1 772 x 1 063 pixels added on 2005-02-23285 viewsEchinoidea taxaDigital photo, part of species Heterocentrotus mamillatus (Linnaeus, 1758)checked Kroh, Andreas 2021-02-24From reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke

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