In the meantime, with the southward invasion of the northern species and the adaptive evolution of the alpine species, the greatest fauna particularity and species diversity are to be found in this region.

• 在此期间，北方物种向南入侵，南北成分交互渗透，高山类群适应进化，使许多特有成分在这里被陶冶、孕育，故而造成了该地区蝇科区系的特有性和物种的多样性。