Period: Middle Ordovician
Find Spot: Kullsberg, Dalarne, Sweden
Size: 73 x 42 mm (!)
Age: approx. 470 MA
Two very big Ordovician cystoids of the kind Caryocysites lagenalis (REGNÈLL, 1945) & Glyptosphaerites suevicus (ANGELIN, 1878). These cystoids are only rarely preserved in this size; detailed surface structures are visible.