Fig. 2.

Maximum clade credibility tree, including the lexical and geographical information. The root is marked with a star, and main nodes (1 to 3 in black circles), as well as main clades (0 to 23), are numbered. Numbers on the branches represent the posterior support for their nodes. Notice the split in node 2, that generates a topology different from previous classifications, for example, making the Central-Western group nonmonophyletic (3, 35). Also, the West-Coastal group includes languages previously classified as North-Western (clades 3 and 4, corresponding to languages B10–B30), and the South-Western branch is monophyletic.