Esempi
The same mode of increase has been adopted independently in phylogenetically distinct clades .
Species in the two primary clades in the genus tend to be found in different parts of North America.
Was survival of the various clades through various biotic crises just a matter of luck?
Fossils are often not ancestors of extant taxa, but instead may be extinct sister groups to modern taxa or clades .
the great ape and human clade