The forewing of Cacopsylla mali (Schmidberger 1836) (Hemiptera, Sternorrhyncha) – a morphological and histological study

Publication date: Available online 21 December 2018Source: Zoologischer AnzeigerAuthor(s): Barbara Franielczyk-Pietyra, Piotr WegierekAbstractThe forewing surface of Cacopsylla mali (Schmidberger 1836) was examined using scanning electron microscopy. Spines and campaniform sensilla on the vein course and small spines on wing membrane cells were described. Cross-sections of the material were performed using histological methods. A two-layered membrane with convex circular or triangular foramens on the dorsal wing surface was revealed. Both, the course of veins and the places of their bifurcation were followed. Three veins, radius (R), media (M) and the first branch of cubitus (CuA) build a common stem. The costal margin comprises only the costal vein. The anal vein (A1) is present (so far, an exception among Sternorrhyncha) but rapidly becomes evanescent. Neither nerves nor tracheae are observed inside veins. The presence of pterostigma is confirmed. Postcubitus turns out to be only a small depression in the clavus part. Plesiomorphies of the wing membrane in C. mali are confirmed. This is the first report on cross-sections of a psyllid forewing.
Source: A Journal of Comparative Zoology - Category: Zoology Source Type: research