Key to Phenacoccus species in Iran

1 Multilocular pores on dorsum present in rows across segments................................................. 2

- Multilocular pores absent from dorsum, except for 1 or 2 on near margins........................................ 6

2(1) Ventral quinquelocular pores numerous................................................................... 3

- Ventral quinquelocular pores restricted to a few around mouthparts, or absent..................................... 5

3(2) Claw with a denticle................................................................................... 4

- Claw without a denticle............................................................. daganiae (Bodenheimer)

4(3) Dorsal multilocular pores numerous across all segments........................................ hordei (Lindeman)

- With dorsal multilocular pores on posterior most abdominal segments only................ arthrophyti (Archangelskaya)

5(2) Quinquelocular pores present around mouthparts.............................................. betae Moghaddam

- Quinquelocular pores absent............................................................ pumilus Kiritshenko

6(1) Circulus present. Cerarii numbering 13–18 pairs............................................................ 7

- Circulus absent. Cerarii numbering 3 pairs.............................................. poae sp. n. Moghaddam

7(6) Quinquelocular pores present on venter................................................................... 8

- Quinquelocular pores absent from venter................................................................. 10

8(7) Ventral tubular ducts of 1 size........................................................................... 9

- Ventral tubular ducts of 2 sizes ............................................................... aceris (Signoret)

9(8) Each segment with dorsal oral collar ducts in single transverse row ............................. salvaicus Moghaddam

- Each segment with dorsal oral collar ducts in 2 or 3 transverse rows................................. insularis Danzig

10(7) Ventral multilocular pores completely absent................................................ bromi Moghaddam

- Ventral multilocular pores present on abdominal segments.................................................... 11

11(10) Ventral multilocular disc pores present medially on abdominal segments IV–IX, restricted to bands across posterior margin of each segment; multilocular disc pores very rarely present on submarginal areas of abdomen and then restricted to segments VI & VII..................................................................................... solani Ferris

- Ventral multilocular disc pores present medially on abdominal segments VI–IX (rarely also 1 or 2 on V), scattered across depth of segment VII between anterior to posterior margins; also usually present submarginally on some abdominal segments (about equally frequent on segments II–VI when present)............................................. solenopsis Tinsley