Karethraichnus lakkos Zonneveld, Bartels, Gunnell et McHugh, 2016

Diagnosis: Shallow (non-penetrating) Karethraichnus having a simple hemispherical profile with a rounded to flattened, hemispherical terminus.

Description: The holotype (Fig. 6.1) and associated material (Figs. 6, 7) of Karethraichnus lakkos occur in the carapaces and plastrons of the geoemydid turtle cf. Echmatemys sp. (Fig. 3). In the material analyzed, trace diameter ranges from 0.6 to 9.0 mm and depth ranges from 0.3 mm to 5.5 mm. The width-to-depth ratio of specimens of K. lakkos ranges from >2 to approximately 1 (i.e., specimens range from half spheres to pits that are much wider than deep). Specimens commonly form imperfect circles with circularities typically less than 1 and greater than 0.75 (Fig. 4). The bases are typically rounded although flattened bases were also observed (Fig. 6.1–6.8, 6.12, 6.16–6.21).