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Reference
19900001_0186
Pièces fossiles de petite taille (0,1 à 5 mm) formées de phosphate de calcium, organismes marins aya
Pièces fossiles de petite taille (0,1 à 5 mm) formées de phosphate de calcium, organismes marins ayant vécu du Cambrien au Trias inclus (-570 à -200 millions d'années). "Bispathodus costatus spinulicostatus". Dévonien supérieur, Sahara algérien, (x 120).
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