Pseudococcus, Westwood, 1840

Zarkani, Agustin, Watson, Gillian W. & Kaydan, Mehmet Bora, 2024, A new species in the mealybug genus Pseudococcus Westwood (Hemiptera: Coccomorpha: Pseudococcidae) from Indonesia, Zootaxa 5555 (4), pp. 590-598 : 596-597

Key to adult female Pseudococcus in Southeast and southern Asia, adapted from Williams (2004).

Note: Although it seems likely that P. maritimus is not present in the area covered by the key, the species is included below in case it is found there in the future.

1(0) Ventral multilocular disc pores present anterior to abdominal segment VI........................................ 6

- Ventral multilocular disc pores absent from anterior to abdominal segment VI..................................... 2

2(1) Tibia + tarsus of hind legs noticeably shorter than trochanter + femur. Oral collar tubular ducts absent.................................................................................................. P. leptotrichotus Williams

- Tibia + tarsus of hind legs either same length as trochanter + femur or longer. Oral collar tubular ducts present, at least on venter.............................................................................................. 3

3(2) Penultimate cerarii (C 17) at most only lightly sclerotized, smaller in diameter than anal ring...... P. dendrobiorum Williams

- Penultimate cerarii (C 17) heavily sclerotized, larger in diameter than anal ring...................................... 4

4(3) Dorsal oral rim tubular ducts absent................................................... P. philippinicus Williams

- Dorsal oral rim tubular ducts present..................................................................... 5

5(4) Dorsal oral rim tubular ducts present by margin in groups of 2 or 3, usually with 1 duct larger than other 1 or 2, and without discoidal pores adjacent to rim. Hind coxa and tibia with translucent pores............. P. longispinus (Targioni Tozzetti)

- Dorsal oral rim tubular ducts present in submarginal and medial areas of abdomen and thorax only, all same size, often each with 1 or 2 discoidal pores adjacent to rim. Hind legs without translucent pores....... P. iffahae Zarkani & Kaydan sp. nov.

6(1) Dorsal oral collar tubular ducts absent. Vulva normal, without sclerotised internal structures..... P. pseudocitriculus Betrem

- Dorsal oral collar tubular ducts present, sometimes with faint narrow rims present singly on most segments. Vulva noticeably well developed, with sclerotized internal structures........................................................... 7

7(6) Eyes each with 1 or more associated discoidal pores.......................................................... 8

- Eyes each without associated discoidal pores.............................................................. 10

8(7) Eyes each with a sclerotized rim containing 4–9 discoidal pores...................... P. jackbeardsleyi Gimpel & Miller

- Eyes each without a sclerotized rim but closely associated with 1–3 discoidal pores................................ 9

9(8) Hind tibia parallel-sided. Legs extending well beyond margins of body. Normally with an oral rim tubular duct present above each anterior ostiole, next to postocular cerarius. Ventral marginal oral collar tubular ducts opposite each mid-coxa usually numbering more than 5.............................................................. P. maritimus (Ehrhorn)

- Hind tibia often with slightly convex margins. Legs rarely extending well beyond margins of body. Without an oral rim tubular duct present above each anterior ostiole, next to postocular cerarius. Ventral marginal oral collar tubular ducts opposite each mid-coxa usually numbering fewer than 5.................................................. P. viburni (Signoret)

10(7) Dorsal setae short, shorter than or same length as ventral setae................................................ 11

- Dorsal setae longer than ventral setae.................................................................... 13

11(10) Dorsum without any oral collar tubular ducts (check margins of posteriormost abdominal segments). Hind leg without translucent pores on coxa but pores present on femur and tibia. Ventral submargin of prosoma without any tubular ducts.................................................................................... P. calceolariae (Maskell)

- Dorsum with at least a few oral collar tubular ducts. Hind leg with translucent pores on coxa and sometimes on femur and/or tibia. Ventral submargin of prosoma with at least a few tubular ducts........................................... 12

12(11) Dorsal setae very short, many only half as long as medium-sized ventral setae or less. Translucent pores present on hind coxa and sometimes tibia but not on femur. Cerarii usually numbering 16 pairs, ocular pair (C 3) often absent; anal lobe cerarii situated on membranous cuticle. Circulus sometimes absent. Only on Poaceae ................. P. saccharicola Takahashi

- Dorsal setae only slightly shorter than ventral setae. Translucent pores present on hind coxa, tibia and femur. Cerarii numbering 17 pairs; anal lobe cerarii situated on sclerotised cuticle. Circulus always present. On various hosts, occasionally including Poaceae ........................................................................... P. comstocki (Kuwana)

13(11) Abdominal segment VII submargin (posterior to posterior ostiole) with tubular duct(s) present. Ventral submargin between prothorax and abdominal segment II with more than 5 oral rim tubular ducts on each side.......................... 14

- Abdominal segment VII submargin (posterior to posterior ostiole) without tubular duct(s). Ventral submargin between prothorax and abdominal segment II with only 2 or 3 oral rim tubular ducts on each side.................................... 15

14(13) Dorsal setae about same length as ventral setae. Abdominal segments without dorsal oral rim tubular ducts on midline........................................................................................... P. cryptus Hempel

- Many dorsal setae obviously longer than ventral setae. A few abdominal segments with dorsal oral rim tubular ducts on midline.................................................. P. gilbertensis Beardsley (= apodemus Williams, 2004)

15(13) Dorsal oral rim tubular ducts present on abdomen................................................ P. baliteus Lit

- Dorsal oral rim tubular ducts absent from abdomen....................................... P. aurantiacus Williams