Example 2

Three fictious methods a, b and c are delimiting the same amount of species (n=6). Their results are nevertheless showing striking differences from a taxonomic perspective. When reported on a phylogenetic framework, these different species partitions are corresponding to different theoretical speciation events (highlighted by coloured circles) and different content. Methods a and b are more congruent than a and c, or b and c (four speciation events commonly inferred from a and b, versus only three for the two other pairs). Methods a and b have commonly delimited three identical species partitions (same content, as highlighted by horizontal connections) whereas a and c do not share any species in common, and b and c only one. Reciprocally, methods inferring different number of species may globally provide highly congruent taxonomies, as exemplified by the method a and a fourth method x (delimiting eight species) which are representing here the most congruent pair of method.