File:Parsimony informative v1.svg

Summary
Example of parsimony informative sites. In phylogenetics, parsimony informative sites are those with at least two states. Here, this is sites 2 and 4. Site 2 indicates a grouping of Species A and C, while site 4 indicates a grouping of Species A and B. Because these two sites conflict, other analyses (such as maximum likelihood) are needed to resolve these four species.