| diversity of proteobacterial endosymbionts in hemlock woolly adelgid (adelges tsugae) (hemiptera: adelgidae) from its native and introduced range. | knowledge of intraspecific variation in symbioses may aid in understanding the ecology of widespread insects in different parts of their range. we investigated bacterial symbionts of adelges tsugae, a pest of hemlocks in eastern north america introduced from asia. amplification, cloning, and sequencing of bacterial 16s rdna, in situ hybridizations, and electron microscopy revealed that a. tsugae harbours up to five bacterial phylotypes, according to population. three gammaproteobacteria species ... | 2013 | 23452267 |