Unaspis MacGillivray, 1921

Niu, Minmin & Feng, Jinian, 2019, Two new species of the genus Unaspis MacGillivray, 1921 (Hemiptera: Coccomorpha: Diaspididae) from China, Zootaxa 4555 (4), pp. 573-580 : 579

Key to world species of Unaspis MacGillivray (adult females)

1 Median lobes with basal part of inner margins linked together................................................. 2

- Median lobes separate over entire length of inner margins.................................................... 3

2 Posterior spiracle associated with 2–4 parastigmatic pores.................................... U. mediforma (Chen)

- Posterior spiracle without any associated pores............................................. U. fanjingensis sp. n.

3 Perivulvar pores present............................................................................... 4

- Perivulvar pores absent.............................................................................. 14

4 Perivulvar pores usually in 3 groups.................................................. most U. citri (Comstock)

- Perivulvar pores in 5 groups............................................................................ 5

5 Posterior spiracle associated with pores................................................................... 6

- Posterior spiracle not associated with pores............................................................... 10

6 Gland spines in interlobular spaces (except between median lobes) present in pairs................................ 7

- Gland spines in interlobular spaces (except between median lobes) present singly................................. 8

7 Antenna with 3 setae; median lobes separated from each other by slightly less than width of median lobe or more.................................................................................................... U. aei Takagi

- Antenna with 2 setae; median lobes separated from each other by about 1/3 width of median lobe.. U. euonymi (Comstock)

8 Margins of median lobes smooth........................................................ U. acuminata (Green)

- Margins of median lobes at least partly serrate............................................................. 9

9 Antenna with 2 setae; anterior spiracle associated with more pores (12–16) than posterior spiracle (6–7 pores).............................................................................................. U. pseudaesculus Tang

- Antenna with 1 seta; anterior spiracle associated with similar number of pores (4–15 (mean 9.65)) to posterior spiracle (0–14 pores (mean 8.20))................................................................ U. mabilis Lit & Barbecho

10 Interlobular spaces (except between median lobes) each containing a pair of gland spines........... U. assimilis (Maskell)

- Interlobular spaces (except between median lobes) each containing a single gland spine........................... 11

11 Anterolateral margins of cephalothorax with 1 small sclerotized prominence on each side, each prominence surrounded by a concentric textural pattern.......................................................... U. xianensis Wang & Liu

- Anterolateral margins of cephalothorax without any small sclerotized prominences.................................................................................................................................... 12

12 Region of the eye with quite a conspicuous prominence on each side.............................. U. atricolor (Green)

- Region of the eye without conspicuous prominence on each side............................................... 13

13 Margins of median lobes serrate; cephalothorax not heavily sclerotized at maturity.................. U. aesculi Takahashi

- Margins of median lobes smooth; cephalothorax heavily sclerotized at maturity.................. U. turpiniae Takahashi

14 Median lobes reduced, replaced by 2 subuliform protrusions.................................. U. menglunensis sp. n.

- Median lobes well developed.......................................................................... 15

15 Interlobular spaces (except between median lobes) each containing a pair of gland spines........ U. rousseti Balachowsky

- Interlobular spaces (except between median lobes) each containing a single gland spine........................... 16

16 Abdominal segments II and III each with more than 10 marginal gland spines; dorsal pygidial macroducts numbering more than 100......................................................................... U. yanonensis (Kuwana)

- Abdominal segments II and III each with fewer than 10 marginal gland spines; dorsal pygidial macroducts numbering fewer than 80............................................................................................. 17

17 Posterior spiracle associated with pores................................................................... 18

- Posterior spiracle not associated with pores................................................................ 20

18 Marginal macroducts numbering 6 on each side of pygidium.................................. U. nanningensis Zeng

- Marginal macroducts numbering 7 on each side of pygidium.................................................. 19

19 Median lobe more than twice as long as second lobe......................................... U. kanoi (Takahashi)

- Median lobes less than twice as long as second lobe...................................... a few U. citri (Comstock)

20 Dorsal pygidial macroducts numbering 25 or fewer......................................... U. permutans (Green)

- Dorsal pygidial macroducts numbering about 40 or more.................................................... 21

21 Dorsal pygidial macroducts present anterior to level of anus; median lobes protruding from median apical notch U. emei Tang

- Dorsal pygidial macroducts absent from anterior to level of anus; median lobes entirely contained within a median apical notch........................................................................................ U. flava (Green)