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 2005-02-23493 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