In August 2021, Euwallacea fornicatus was detected at a residential premise in Perth, Western Australia, infesting a box-elder maple tree (Acer negundo). Further delimiting surveillance has detected the pest in the surrounding suburban area on multiple hosts including Acer saccharum, Delonix regia, Erythrina sp., Mangifera indica, and Sapindus sp. A Quarantine Area has been established to restrict movement, contain the pest, and delimiting surveillance is ongoing. Synonyms: Xyleborus fornicatus Eichhoff, 1868; Xyleborus tapatapaoensis Schedl, 1951; Xyleborus whitfordiodendrus Schedl, 1942