The soft yellow body is concealed under a roughly circular, whitish test with a yellowish-brown off-centre spot (this is the exuviae or shed skins of the last two nymphal moults).

[1] Pseudaulacaspis pentagona is native to eastern Asia but has been accidentally introduced into many other warm and temperate parts of the world.

In Europe, it was first detected in Italy in the nineteenth century and is now additionally found in Azerbaijan, Bulgaria, France, Georgia, Germany, Greece, Hungary, Macedonia, Malta, Montenegro, Netherlands, Portugal, Russia, Serbia, Spain, Sweden, Switzerland, Turkey and Ukraine.

It also infests various ornamental plants, including Sophora, Sorbus, Syringa, Catalpa, Euonymus, Philadelphus and Paulownia.

[3] Mature females lay 100 to 150 eggs, the number largely depending on the food plant.