The analysis of hundreds of fossils in the Polish Basin reveals a stepwise increase in dinosaur diversity and ecospace occupancy, linked to climatic changes and the emergence of new feeding patterns.
Bromalites from the Triassic-Jurassic succession indicate a significant transition in feeding behaviors, with larger dinosaur faunas evolving alongside replacement of previous guild members by opportunistic dinosaurs.
The increasing size and diversity of bromalites signal the expansion of herbivore ecospace, as vegetation shifts enabled large sauropodomorphs and early ornithischians to diversify their diets.
Rapid evolution of theropods occurred in response to new herbivore guilds, establishing patterns of dominance and gigantism that would define the dinosaur era until the Cretaceous extinction.
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