Fig. 3 in A symbiotic association of a boring polychaete and an echinoid from the Late Cretaceous of Germany

Fig. 3. SEM images of a latex cast prepared from the trace−bearing plastron area of the Echinocorys ovata (Leske, 1778) echinoid (Early Maastrichtian; "Klementelvitz" quarry, Rügen Island, N Germany). A. Traces # 4–7 oriented sub−parallel to each other in close proximity to the periproct B. Lateral view of the moderately deep U−shaped trace # 12 showing a distinct regeneration texture in form of primary and miliary tubercles.