Arachnoides placenta (oral)
Description Oral 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
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added on 2005-02-23405 viewsTraits taxaDigital photo, part of species Arachnoides placenta (Linnaeus, 1758)checked Kroh, Andreas 2021-02-24From reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha...
© 2005 Schultz, Heinke