Polypedilum

Oyewo, Emmanuel Adeoye & Saether, Ole A., 2008, Revision of Polypedilum (Pentapedilum) Kieffer and Ainuyusurika Sasa et Shirasaki (Diptera: Chironomidae), Zootaxa 1953, pp. 1-145 : 32-33

Key to sufficiently known females of Polypedilum subgenus Pentapedilum

1. Abdominal segments banded.................................................................................................................... 2

- Abdominal segments uniformly colored ................................................................................................... 4

2. Abdominal segments brown with darker posterior bands; thorax brown; segment X with 2–4 setae ( Fig. 8C) ........................................................................................................................ P. (Pe.) anale (Freeman)

- Abdominal segments either with broad dark bands and pale posterior margins or brown with darker posterior bands; thorax with darker patches; segment X with more than 4 setae. ......................................... 3

3. Abdominal segments with broad dark bands and pale posterior margins; clypeus with 33–39 setae; 28– 39 dorsocentrals; dorsomesal lobe caudally broad; seminal capsule may be spherical. ............................. ................................................................................................................... P. (Pe.) sordens (van der Wulp)

- Abdominal segments brown with darker posterior bands; clypeus with 25–26 setae; 13–14 dorsocentrals; dorsomesal lobe caudally broad; seminal capsule oval with moderately sclerotized neck. ....................... ............................................................................................... P. (Pe.) macrotrichium (Guha et Chaudhuri)

4. Seminal capsule spherical.......................................................................................................................... 5

- Seminal capsule ovoid ............................................................................................................................... 7

5. Postgenital plate broadly triangular; ventrolateral lobe brush-like and nearly straight............................... ............................................................................................................................. P. (Pe.) chutteri Harrison

- Postgenital plate U-shaped; ventrolateral lobe curved .............................................................................. 6

6. Ventrolateral lobe brush-like and strongly curved; seminal capsule neck long; gonocoxite IX with 8 setae; wing length 2–8 mm ......................................................... Polypedilum (Pentapedilum) sp. Ukraine

- Ventrolateral lobe not strongly curved; seminal capsule neck short; gonocoxite IX with 16–17 setae; wing length less than 2.2 mm ..................................................... P. (Pe.) robusticeps (Guha et Chaudhuri)

7. Wing length 0.9 mm; scutellum with 4 setae; clypeus with less than 10 setae; dorsomesal lobe caudally narrow; thorax pale brown; LR 1 1.79 .............................................................. P. (Pe.) trukense (Tokunaga)

- Wing length more than 1.00 mm; scutellum with more than 5 setae; clypeus with more than 10 setae.. 8

8. LR 1 about 2.0; thorax brown at postnotum, antepronotum, preepisternum, and scutellum; tergite IX with 14–15 setae; wing length 1.04–1.21 mm ................................................................ P. (Pe.) micra Freeman

- LR 1 lower than 2.0; thorax almost unicolored........................................................................................... 9

9. Postgenital plate nearly U-shaped; ventrolateral lobe brush-like and slightly curved; LR 1 1.4–1.6. ......... ........................................................................................................................ P. (Pe.) pygmaeum (Kieffer)

- Postgenital plate triangular ...................................................................................................................... 10

10. LR 1 lower than 1.50; wing length about 1.0 mm; ventrolateral lobe not comb-like, almost clumped and nearly straight ..................................................................................................... P. (Pe.) esakii (Tokunaga)

- LR 1 higher than 1.49; wing length more than 1.5 mm; ventrolateral lobe brush-like or with strands. .. 11

11. Thorax brown at postnotum, antepronotum, preepisternum or with brown and yellow patches; gonocoxite IX with not more than 4 setae............................................................................................................. 12

- Thorax uniformly colored; gonocoxite IX with at least 4 setae .............................................................. 15

12. Thorax brown at postnotum, antepronotum, preepisternum, and scutellum; wing length higher than 2.3 mm; squama with more than 6 setae........................................................................................................ 13

- Thorax with scutellum and scutum yellow; wing length lower than 2.2 mm; squama usually with less than 6 setae............................................................................................................................................... 14

13. Tergite IX with about 45 setae; postgenital plate narrowly triangular; clypeus with about 30 setae; seminal capsule neck short; squama with about 10 setae ............................................. P. (Pe.) wittei (Freeman)

- Tergite IX and clypeus each with about 20 setae; postgenital plate broadly triangular; seminal capsule neck long; squama with about 7 setae ................................................................. P. (Pe.) hamoni Freeman

14. Foretibial scale with apical spur; squama with 4-11 setae ................................ P. (Pe.) kasumiense (Sasa)

- Foretibial scale without apical spur; squama with about 3 setae ......................... P. (Pe.) shirokense (Sasa)

15. Seminal capsule neck short; clypeus with about 10 setae .................................. P. (Pe.) ruandae Freeman

- Seminal capsule neck long; clypeus with more than 10 setae................................................................. 16

16. Foretibial scale with subapical spur; 7–14 acrostichals........................................................................... 17

- Foretibial scale without apical spur; 24–34 or 13–22 acrostichals.......................................................... 18

17. Ventrolateral lobe distinctly curved; WL/Pfe 1.97–2.30 ....................... P. (Pe.) epleri Oyewo et Jacobsen

- Ventrolateral lobe slightly curved; WL/Pfe 2.57–2.94 .......................................... P. (Pe.) tritum (Walker)

18. Seminal capsule ovoid, 86–100 µm long; 15–23 dorsocentrals; 24–34 acrostichals. ................................ ............................................................................................................................ P. (Pe.) vittatum Freeman

- Seminal capsule almost spherical, 52–69 µm long; 30–38 dorsocentrals; 13–22 acrostichals. ................. ............................................................................................................... P. (Pe.) uncinatum (Goetghebuer)