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An 8.5 m long ammonite drag mark from the Upper Jurassic Solnhofen Lithographic Limestones, Germany

Fig 3

The ammonite Subplanites rueppellianus, the producer of the drag mark (MCFO 0492).

Note the touch down mark which changes the orientation (and number) of the ridges in the substrate, anteroventral to the ammonite. Scale measures 5 cm.

Fig 3

doi: https://doi.org/10.1371/journal.pone.0175426.g003