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Echinodermata (echinoderms)
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Echinoidea (sea urchins)
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Clypeasteroids
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 2005-02-23
374 views
From reference
Schultz, H. (2006). Sea urchins: A guide to worldwide sha...
© 2005 Schultz, Heinke
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