Basal surface of the honeycomb-like arranged pyritized egg capsules cluster enclosed in driftwood from Late Pliensbachian of Buttenheim (SNSB-BSPG 2022 I 1). A: Complete crescent-sized cluster. The original wood basis changed due to fossilization processes into jet coal (on the picture above left). B: On the egg bases, the fine wood fibers of the original basement are preserved by bioimmuration and, therefore, visible. C: The molds of broken-out egg capsules exhibit their smooth surfaces with a small central pore. Scale bars 500 µm.