FIGURE 3 in Bioerosion traces on the Campanian turtle remains: New data from the lagoonal deposits of the Quseir Formation, Kharga Oasis, Egypt

FIGURE 3. (A) Nihilichnus nihilicus, circular, subcircular to ellipsoidal non-penetrating holes (arrows) on the carapace peripheral. (B, C) Karethraichnus lakkos. (B) Cluster of bowl-shaped pits (arrows) of on the carapace peripheral. (C) Small rounded holes (arrows) of which are not completely penetrating the plastron fragments. (D) External surface of carapace peripheral containing three ichnospecies Cubiculum ornatus, C. inornatus and Osteocallis mandibulus (E, F, and H, respectively). (E) Cubiculum ornatus (arrows), showing the characteristic features of the ichnospecies with well pronounced bioglyphs. (F) Cubiculum inornatus (arrow), showing details of the morphological features the ichnospecies. (G) Cubiculum isp., showing borings arranged in groups of mostly parallel to each other and infilled with sediments. (H) Osteocallis mandibulus (ellipse), showing, randomly oriented surface borings with distinct arcuate (commonly paired) scratches in turtle skeleton. Scale bars equal 0.5 cm, except for B, D and G, which are 1.0 cm, and for C, which is 0.4 cm.