branches
represent an evolutionary lineage leading to the taxon/ taxa at the end of the branch
internal node
A hypothetical common ancestor from which two separate
evolutionary lineages have diverged.
outgroup
A taxon with an evolutionary lineage that has diverged from the rest
of the taxa in the cladogram or phylogenetic tree.
sister taxa
Separate groups of closely related organisms that share an
immediate common ancestor that is not shared by any other group.
terminal node
Individual groups of organisms (taxa) with their own
independent evolutionary lineage.