It was originally thought to belong to the same genus as PASAC 1, a large unnamed specimen known as the "Sabinas hadrosaurid", but this referral was later rejected.

The terrestrial deposits, in which the contemporary ornithomimosaur Paraxenisaurus was found, are believed to represent a coastal floodplain on the margin of an estuary.

The presence of a diverse array of crocodiles, turtles, and freshwater bivalves suggests a heavily vegetated riverine ecosystem.

The abundance of dinosaur teeth and bone fragments also suggests that the region was replete with vegetation and supported a diverse assemblage of megafauna.

Teeth from theropods are very common and have shown that tyrannosaurids, dromaeosaurids, troodontids,[6] and caenagnathids[7] lived in this environment in addition to the above-mentioned ornithomimosaurs.

[6] Like most fluvial sediments from the Campanian of Laramidia, the Cerro del Pueblo Formation was home to a wide array of turtles including pleurodires, paracryptodires, cheloniids, kinosternids, and trionychids.