Supplementary Information

All specimen numbers, recorded gut contents, mandible lengths, stratigraphic information, and tooth measurements used in this study. Please see the attached references document for relevant bibliographic citations

The ammonite <i>Subplanites rueppellianus</i>, the producer of the drag mark (MCFO 0492).

<p>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.</p

Various Plattenkalk localities of the Franconian and Swabian Alb.

<p>Note the location of Langenaltheim, near Solnhofen, the probable location of MCFO 0492. Reprinted from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0175426#pone.0175426.ref035" target="_blank">35</a>] under a CC BY license, with permission from Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, original copyright 2007.</p

Measurements of the drag mark width of MCFO 0492, including the number of ridges present.

<p>Measurements marked with an * are estimated. Estimates were made when the total number of ridges were unclear.</p

Supplementary file from Fossil evidence for the ancient link between clonal fragmentation, six-fold symmetry and an epizoic lifestyle in asterozoan echinoderms

Nexus file used to run the Bayesian inference analysis

Appendix on comparative morphology of Knebelia species.

This table shows all characters used in the description of the three recognized species of Knebelia Van Straelen, 1922: Knebelia bilobata (Münster, 1839), the type species; Knebelia schuberti (Meyer, 1836); Knebelia totoroi Audo, Schweigert & Charbonnier, in press. Data comes from samples preserved in collections of Bayerische Staatssammlung für Paläontologie und historische Geologie (Munich, Germany), Jura-Museum (Eichstätt, Germany), 2Staatliches Museum für Naturkunde (Stuttgart, Germany), Museum national d'Histoire naturelle (Paris, France), Natural History Museum (London, United Kingdom) and Sedgwick Museum of Earth Sciences - Cambridge University (Cambridge, United Kingdom)

Supplementary Figure from Fossil evidence for the ancient link between clonal fragmentation, six-fold symmetry and an epizoic lifestyle in asterozoan echinoderms

Phylogenetic tree with support values