Key to Iranian species of Phenacoccus

1 With more than 1 circulus .................................................................................................................... aceris (Signoret)

- With 1 circulus or none................................................................................................................................................. 2

2 Circulus present. Cerarii numbering 18 pairs. .............................................................................................................. 3

- Circulus absent. Cerarii numbering 2–7 pairs. ............................................................................................................ 5

3 Quinquelocular pores present on venter ................................................................................... perillustris Borchsenius

- Quinquelocular pores entirely absent from dorsum and venter.................................................................................... 4

4 Antennae normally 9-segmented. Multilocular disc pores on venter usually present only as far forward as segment VI, and usually present along anterior edge of segment VII. Circulus often produced laterally, flaccid ....................... ........................................................................................................................................................... solenopsis Tinsley

- Antennae normally 8-segmented. Multilocular disc pores on venter usually present as far forward as segment IV, and usually absent from anterior edge of segment VII. Circulus usually small, slightly oval .......................... solani Ferris

5 Cerarii numbering 2 pairs, present on 2 last abdominal segments .................................... arthrophyti Archangelskaya

- Cerarii numbering 7 pairs, C1–4 and C16–18 ................................................................................. betae Moghaddam sp.n.