The Metazoan Phylogeny phylogenetic tree shows Ecdysozoa, Lophotrochozoa, and Deuterostomia families. Many phylogenetic trees have a single lineage at the base representing a common ancestor. As the phylogenetic tree diagram suggests, the major components of such trees are leaves. The leaves of a tree can be species, populations, individuals, or even genes. If the tips represent a formally named group, they are called taxa (singular: taxon). A 'taxon' is a group of organisms at any hierarchical rank, such as a family, genus, or species. With EdrawMax Online, you can create similar phylogenetic tree diagrams for your usage. The free phylogenetic tree maker offers tons of customization and has a good remote team collaboration. Scientists call such trees' rooted,' which means there is a single ancestral lineage (typically drawn from the bottom or left) to which all organisms represented in the diagram relate.