 The bacterial microbiome of psyllids has been studied for decades, with a strong focus on the primary and secondary endosymbionts responsible for providing essential amino acids for the insect's diet. These symbionts play a key role in the insect's ability to radiate on novel plant hosts. In this study, researchers combined meta-barcoding analysis of the bacterial communities hosted by psyllids with a multi-gene phylogenetic analysis of the insect's hosts to determine what factors influence the bacterial diversity of the psyllids' microbiomes. They found that the bacterial diversity of psyllids is strongly associated with their phylogenetic structure, as well as their host plant association and geographic distribution. Additionally, they discovered that the strongest co-phylogenetic signals were derived from the primary and secondary symbionts, suggesting potential vertical transmission of bacterial lineages previously unknown to have symbiotic roles. This article was authored by Francesco Martoni, Simon R. Bowman, Alexander M. Piper and others. We are article.tv, links in the description below.