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IMIS Photogallery » Echinodermata (echinoderms) » Echinoidea (sea urchins)
Cidaris nuda (ambularal plates, apical disc and spine cross section)
Cidaris nuda (ambularal plates, apical disc and spine cross section)
Description Left: Part of ambulacrum: The inner tubercles of either plate form a fairly regular row. Middle: Apical system. Right: Part of transverse section of aboral primary spine: The ridges are prominent.
Left: Scale 3 mm, middle: Scale 5 mm, right: Scale 500 µ. Author Mortensen, Theodor JPG file - 212.87 kB - 1 691 x 614 pixels added on 2011-02-23216 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor
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