Figure 11. Healed penetrative Karethraichnus borings in cf. Echmatemys sp. shells. All scale bars are 5 mm. In all pairs, the left image shows the external surface and the right images shows the internal (visceral) surface. (1) Karethraichnus on a costal fragment of which the largest two have complete internal healings (UA-TF153). (2) Hypoplastron fragment with a single Karethraichnus (UA-TF154). The internal healing in this specimen is incomplete. (3) Costal fragments with a single Karethraichnus shown in external, visceral and cross-sectional views (UA-TF155). (4) Costal fragment with a large Karethraichnus penetrating through the shell (UA-TF156). The size of the healing in both (3)and (4) is larger than the external opening suggesting that the parasite continued to grow after penetrating through the shell (UA-TF157). (5) Three healed Karethraichnus borings on a costal fragment (right iC1). (6) A single healed Karethraichnus on a left hypoplastron (UA-TF158). All scale bars 5 mm.