Tetraneura ulmi (Linnaeus, 1758)

Fig. 16

Diagnosis

Apterae 1.5–3 mm, pink, orange or purple, with a thin iridescent wax layer that is easily worn off. Siphuncular pores elevated on low cones. Dioecious. Alternating between elm Ulmus (Ulmaceae) and

grass roots ( Poaceae). Anholocyclic populations on secondary hosts common all year, and particularly juveniles are often seen in moss samples. Often in association with ants.

Distribution

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