FIGURE 4 in A fragmentary leptonectid ichthyosaurian from the lower Pliensbachian of Luxembourg

FIGURE 4. Post-mortem scratch marks. Details of the bone surface of the possible surangular (A) and a vertebral fragment (B) of MNHNL LM226. These scratch marks with their characteristic radial shape are assignable to the ichnogenus Gnathichnus sp. and attributed to the grazing activities of regular echinoids. The orange arrows indicate some of best-preserved marks. ; Published as part of Fischer, Valentin, Laboury, Antoine, Bernacki, Kamil, Garbay, Laurent, Gillen, Yan, Rollinger, Charel, Thill, Anjin, Weis, Robert & Thuy, Ben, 2022, A fragmentary leptonectid ichthyosaurian from the lower... Mehr ...