Fig. 9From: Taphonomy and palaeoecology of the green Devonian gypidulid brachiopods from the Aferdou El Mrakib, eastern Anti-Atlas, MoroccoCorrelation between the Fe concentration in the shell and the green surface-colour on Stringocephalus sp., (Germany), Devonogypa sp., (Morocco), two specimens of Ivdelinia pulchra (Morocco) and the rhynchonellid (Morocco)Back to article page