Fig. 7

Light microscopy (LM) of the general morphology of Pemphigus populiglobuli secondary generation detected in Svalbard. A Winged viviparous female (sexupara) collected in Fjortendejulibukta bird cliffs. Antennal segments III B and C IV with visible large, transverse oval secondary rhinaria. D Base of the antennal segment VI with one major and 1–2 poorly visible accessory rhinaria with ciliated cuticle edges. E Wax gland plate of marginal abdominal tergite VI (arrow)