Metrosideros spp added based on statement that "the eugenia psyllid . . . which in its native range feeds on Syzygium host species, has expanded its host range to include another introduced myrtaceous genus, Metrosideros, in California" on page 5 of Percy et al., An annotated checklist of the psyllids of California (Hemiptera: Psylloidea), Zootaxa 3193: 1–27 (2012), https://www.mapress.com/zootaxa/2012/f/zt03193p027.pdf. The article refers to "Trioza eugeniae," based on the then-accepted misidentification of T. adventicia, and does not address whether the psyllid causes galls on Metrosideros.