The top of the tail was at least 2.9 metres (9.5 ft) high, and the only theropod species known from the same rock formation that was tall enough to make such an attack is T. rex.
Vrh repa je bio visok barem 2,9 m, a jedini teropod poznat iz iste formacije koji je bio dovoljno visok da nanese takvu ozljedu bio je T. rex.