Universidades de Reino Unido analizaron varios datos de 82 especies de terópodos. La forma de los brazos tendría relación con la dimensión de los cráneos de estos dinosaurios

The evolution of tiny arms in several groups of meat-eating dinosaurs was likely driven by the development of strong, powerful heads, which were used to attack prey, according to…

Five different groups of predatory dinosaurs independently evolved disproportionately small arms, and it seems they did so because their heads became so large and powerful