Life-cycle-truncation
Guides
Pemphigus populiglobuli
poplar bullet gall aphid
Pemphigus populiglobuli is a Nearctic aphid species known for forming bullet-shaped galls on poplar leaves during its primary generation. The Svalbard High Arctic population represents a remarkable secondary generation that has lost its primary host association and adapted to year-round root-feeding on grasses. Molecular analyses confirmed these specimens belong to P. populiglobuli rather than the historically assumed P. groenlandicus. The study proposes synonymizing P. groenlandicus and its subspecies crassicornis under P. populiglobuli based on morphometric similarity across Arctic and European populations.