Spectacular piece (positive + negative), measuring ± 18 x 9 cm, with several echinoderms (the largest measuring ± 9 cm). These pieces are very difficult to find of good quality due to the difficulty in cleaning. Sandblasted it has been taken out in great detail.
The homosteleans (Homostelea) or carpoids are an extinct class of homalozoan echinoderms.
Ordovician, Katien
Tizi n´Mourghi,Morocco
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