On the principle of the continued tendency to divergence of character, which was formerly illustrated by this diagram, the more recent any form is the more it will generally differ from its ancient progenitor.
Aurrerago diagramaren bidez azaldu dugun ezaugarrien dibergentziarako joeraren hastapenaren arabera, zenbat eta forma bat oraintsuagokoa den, orduan eta ezberdinagoa izanen da eskuarki antzinako gurasolehenarengandik.