FIG. 3.

Phylogenetic trees from neighbor-joining analyses of psyllid P-endosymbiont nucleotide sequences of combined 16S-23S rDNA and relationship of the results to the classification of psyllids based on morphology. Numbers at nodes are for bootstrap percentages from 1,000 replicates; only nodes supported by 50% or greater are shown. Designations refer to psyllid hosts, vertical lines indicate assignments of psyllids to subfamilies and families, and the question mark indicates uncertain taxonomic affiliation.