Which dinosaur's massive bulk is explicitly used as a point of contrast for Xenotarsosaurus's size?
Answer
Tyrannosaurus
When describing the physical presence of Xenotarsosaurus, the text specifically contrasts it with much larger forms to contextualize its medium size. It is noted that this Argentinian theropod did not possess the massive bulk characteristic of a Tyrannosaurus. This comparison immediately establishes that Xenotarsosaurus was not one of the apex super-predators, but rather a more moderately sized hunter adapted for a different scale of predation within its environment, relying more on agility than sheer mass.

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