Phylogenetic trees from analyses of four nuclear genes for representative taxa of the four major holometabolous insect orders.

<p>Sequences for the analysis of wingless, PEPCK, and ArgK were obtained from the NCBI database, the 18S dataset represented a reduced dataset from the analysis of Whiting (2002) that was supplemented with some additional taxa of Apidae from the NCBI database. Hymenopteran taxa are highlighted by yellow branches.