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Cidaridae (pedicellariae)
Description Valves of large globiferous pedicellariae: a. Stereocidaris ingolfiana: The subterminal opening is surrounded by small denticles, but there is no closed space between them as in Tretocidaris. b. Stylocidaris affinis: There are no enlarged end teeth, the blade opening is definitely "terminal". c. Tretocidaris spinosa: Below the single large end tooth the blade opening is very small. the interspace is closed.No scale. JPG file - 143.66 kB - 1 324 x 1 072 pixels added on 2011-02-231 201 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Mortensen, Theodor
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