\ Tcas: *Tribolium castaneum*, Dmel: *Drosophila melanogaster*, Bmor: *Bombyx mori*, Apis: *Acyrthosiphon pisum*, Amel: *Apis mellifera*. The *C. pallens* unigenes were labeled with 'CL' (clusters) and 'U' (unigenes). CL-X: CL-contigX.