. "Psyllids are insects that harbor endosymbionts (Candidatuus Carsonella ruddii) within specialized cells found in the insect's body cavity. Previous phylogenetic analyses based on endosymbiont 16S-23S ribosomal DNA and a host gene were concordant (M.L. Thao, et al., Appl. Env. Microbiol. 66:2898, 2000). Additional analyses with atpAGD and rpoBC gave similar trees showing the agreement expected from organisms that evolve through vertical transmission with no gene exchange." . . . "Curr. Microbiol." . "Clark M.A." . "Baumann P." . "Moran N.A." . "Thao M.L." . "Burckhardt D.H." . "2001"^^ . "419-421" . "Phylogenetic analysis of vertically transmitted psyllid endosymbionts (Candidatus Carsonella ruddii) based on atpAGD and rpoC: comparisons with 16S-23S rDNA-derived phylogeny." . "42" . "doi:10.1007/s002840010240" .