Abstract
Insects of the heteropteran superfamilies Coreoidea and Lygaeoidea are consistently associated with symbionts of a specific group of the genus Burkholderia, called the “stinkbug-associated beneficial and environmental (SBE)” group. The symbiosis is maintained by the environmental transmission of symbionts. We investigated European and Japanese populations of the dock bug Coreus marginatus (Coreoidea: Coreidae). High nymphal mortality in reared aposymbiotic insects suggested an obligate host-symbiont association in this species. Molecular phylogenetic analyses based on 16S rRNA gene sequences revealed that all 173 individuals investigated were colonized by Burkholderia, which were further assigned to different subgroups of the SBE in a region-dependent pattern.
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