Table 2.

Morphological characters of adult females of Nidularia balachowskii, Nidularia pulvinata, Kermes quercus and Kermes roboris.

Character	Nidularia balachowskii	Nidularia pulvinata	Kermes quercus	Kermes roboris
antennal segments	1	1	4	5–6
labium segments	3	3	3	3
locular pores on spiracle peritreme	absent	present	absent	absent
locular pores surrounding spiracles	present	present	present	present
legs	absent	absent	present	present
bilocular pores on venter	present	present	present	present
simple pores on dorsum	present	present	present	present
setae -pore clusters on venter	absent	absent	present	present
tubular ducts on venter	1 type	1 type	2 types	2 types
anal ring location	ventral	ventral	dorsal	dorsal
anal ring shape	2 semi- circles	2 semi-circles	circular, complete	2 semi-circles
anal ring cells	present	present	absent	absent
anal ring setae	3 pairs setae	3 pairs setae	setae absent, rare with 2 setae	setae absent, rare with 2 setae