However, Arbour & Currie (2015) questioned whether or not the sternum was preserved. The bone, tentatively identified as the left sternum, was found adjacent to various other elements and its boundaries remain unclear. The sternum could have possibly been displaced post-mortem, resulting in the anteriorly pointing posterolateral process.
Despite Arbour & Currie's (2015) inquiry into whether or not the sternum was preserved, the bone's status remains uncertain. Initially believed to be the left breastbone, it was found near other skeletal components and its edges are unclear. The breastbone may have been displaced after death, causing its posterior lateral process to point forward.