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Clypeaster amplificatus Koehler 1922
Clypeaster amplificatus Koehler 1922
Description Clypeaster amplificatus Koehler 1922, holotype (from Massawa, Erythrea). 
Only known specimen, might also be just a huge and very flat C. humilis - but the difference in internal pillars seems specific, if not another size artifact. 

Koehler says : "By its large dimensions, by its very depressed test not raised at the petals, by its flat ventral surface without a well characterized infundibulum, it seems necessary that the species of the Red Sea must be placed in the section Coronanthus. This Clypeaster recalls a little some large individuals of Clypeaster humilis. But the similarities are limited to the size and general form. The enormous development of the closed petals that remain flush with the test, so wide that the interambulacal regions become linear well before reaching the apical system, opposes any relationship with Cl. humilis, which belongs moreover to another section. The species approaches more Cl. subdepressus of the Atlantic, but the latter has, according to Agassiz, a well characterized peristomial infundibulum".  Author Koehler, René JPG file - 255.70 kB - 747 x 637 pixelsmore
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 added on 2025-10-20170 viewsEchinoidea taxaDigital photo, entire species Clypeaster amplificatus Koehler, 1922
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