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IMIS Photogallery » Echinodermata (echinoderms) » Echinoidea (sea urchins) » Clypeasteroids
Arachnoides placenta (aboral)
Arachnoides placenta (aboral)
Description Aboral side: The periproct opens into a distinct marginal notch (arrow), and a naked furrow passes along the median suture in the posterior interambulacrum. In Arachnoides tenuis there is no marginal notch and no naked furrow. Author Schultz, Heinke JPG file - 438.74 kB - 940 x 1 358 pixels added on 2005-02-23374 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke
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