FIGURE 3. Hypothetical tree (classification) of 12 species with 7 nodes (0–6). See Table 5 and text. Node 1 suggests there is evidence to support a group E–L to the exclusion of A–D; that there is evidence to support a group E–H to the exclusion of A–D and I–L; that there is evidence to support a group E–F to the exclusion of A–D and G–L, etc., through all nodes 4–6. The assignment of taxonomic level is not particularly important (see Table 5, for an example), only the monophyly of each: data, relationships and the classification hierarchy are isomorphic.