Fig. 5

Scanning electron microscopy (SEM) of the general morphology of Pemphigus populiglobuli secondary generation detected in Svalbard. A Hind legs of waxed specimen of the summer population. B Hind tibia and tarsus of ‘dewaxed’ specimen of the summer population. C Hind tarsus of ‘dewaxed’ specimen of the summer population with visible campaniform sensillum (arrow). D Ventral side of posterior part of the abdomen of waxed specimen of the summer population with visible subgenital plate (sp) and anal plate (ap). E Dorsal side of the posterior part of the abdomen of ‘dewaxed’ specimen of the hibernating population with clear wrinkled ornamentation of the cuticle. F Smooth area of the cuticle at the base of the abdominal marginal seta of ‘dewaxed’ specimen of the hibernating population; wingless viviparous females all collected in Longyearbyen