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Holopneustes (ambulacra)
Description In Amblypneustes (left) the primary tubercles in the ambulacra (A) from a regular vertical row, one tubercle is associated to each triad of pore-pairs. In Holopneustes (right) they are irregularly arraged, often only on every second or third plate.Scale 5 mm. JPG file - 182.78 kB - 1 660 x 474 pixels added on 2005-02-23251 viewsFrom reference Schultz, H. (2006). Sea urchins: A guide to worldwide sha... © 2005 Schultz, Heinke
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