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The study of trace fossils, such as tooth marks, can be used to provide information on feeding behavior (Jacobsen and Bromley 2009). Subsequent bone modification by the trace makers on the corpses also can be studied to determine feeding methods and jaw mechanics (Gignac and Erickson 2012). Morphology of the traces can be quantified to further discern these mechanisms by comparing potential modern and extinct animal trace-makers (Roland and Bromley 2009). In this paper, the ichnological terminology of tooth trace kind and category is followed as reported by Tanke and Currie (1998), Pirrone et al. (2014), and Jacobsen and Bromley (2009). Interpretation of the causes of these tooth traces offers information on social and environmental causes (Lovell, 1997). Additionally, the bone modifications made by animals while feeding also leave tell-tale traces on the bones of the prey items (Johnson 1989) and can be used to interpret behavior.
Tyrannosaurus rex, as the top predator in the Lancian ecosystem, has been suggested to have had the ability to crush large bones in a single bite (Gignac and Erickson 2012). In this report we argue that trace fossils and bone modification can be used to unravel taphonomical events and lend insight into life histories of Tyrannosaurus rex, especially of the individual, ‘Peter’.