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An 8.5 m long ammonite drag mark from the Upper Jurassic Solnhofen Lithographic Limestones, Germany
- Dean R. Lomax,
- Peter L. Falkingham,
- Günter Schweigert,
- Alejandro P. Jiménez
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- Published: May 10, 2017
- https://doi.org/10.1371/journal.pone.0175426