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Hemiaster expergitus (apical system)
Hemiaster expergitus (apical system)
Description The apical system is ethmophract: The posterior genital plates and the posterior ocular plates join each other.
Specimen of 37 mm length. Author Mortensen, Theodor JPG file - 23.16 kB - 406 x 451 pixels added on 2009-02-23600 viewsFrom reference Schultz, H. (2009). Sea urchins II: Worldwide irregular d... © 2009 Mortensen, Theodor
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