Fig. 4A: Internally cemented brachiopod samples from Gotland. Articulated atrypid sample from the Mulde beds with geopetal infilling of micritic sediment and calcite cements (polished slab). Inside the dorsal valve fibrous and scalenohedral cements. Central pore space filled with blocky spar cements: black asterisk = equant spar A, white asterisk = coarse-grained spar B. Dark areas within spar A reflect open voids. Field of view is 2.5 cm.