Monopelopia Fittkau, 1962

Duan, Xin, Chang, Tong, Jiao, Ke-Long, Wang, Xin-Hua & Lin, Xiao-Long, 2021, Monopelopia Fittkau, 1962, a newly recorded genus from Oriental China (Diptera Chironomidae) with a description of Monopelopia zhengi Lin sp. n., Zootaxa 4980 (2), pp. 383-388 : 386-387

Key to known adult males of Monopelopia Fittkau

(adapted from Oliveira et al. (2010), Paul, Hazra & Mazumdar (2014) and Dantas & Hamada (2017))

1. Mid and hind legs bearing single tibial spur................................................................ 2

- Mid and hind legs bearing two tibial spurs................................................................ 16

2. Vein R 2 present....................................................................................... 3

- Vein R 2 absent........................................................................................ 5

3. Vein R 2 apically forked............................................................. M. divergens (Johannsen)

- Vein R 2 not apically forked............................................................................. 4

4. Second palpomere with 2–3 darker spines; hind tibial comb with seven setae, ta 3 with pseudospur..................................................................................................... M. boliekae Beck & Beck

- Second palpomere without darker spine; hind tibial comb with 8 setae, no pseudospur on ta 3 ............................................................................................. M. mongpuense Paul, Hazra & Mazumdar

5. Wing length 1.0 mm........................................................ M. minuta Serpa-Filho & Oliveira

- Wing length> 1.0 mm................................................................................. 6

6. Second palpomere with pale subapical setae subequal to its length; temporals uniserial to multiserial.................................................................................................... M. tenuicalcar (Kieffer)

- Second palpomere with at least one pale subapical seta longer than its length; temporals uniserial...................... 7

7. Tergite IX with two setae............................................................................... 8

- Tergite IX with 4–9 setae.............................................................................. 10

8. Tergite VIII pale; numerous blunt tipped setae present on all tarsomeres........................ M. mikeschwartzi Epler

- Tergite VIII brown; blunt tipped setae absent on all tarsomeres................................................. 9

9. Tergite IX with one seta on each side; hind tibial comb with 5–6 setae; prealars 14............ M. tillandsia Beck & Beck

- Tergite IX with two setae on each side; hind tibial comb with 7–9 setae; prealar 1................... M. pavida Harrison

10. Palpomere 2 / palpomere 3 0.31–0.34.................................................................... 11

- Palpomere 2 / palpomere 3 0.52–0.70.................................................................... 13

11. Wing length 1.22–1.39 mm; middle tibia without preapical long seta; Tergites I-V with a broad oral brown band............................................................................ M. caraguata Mendes, Marcondes & Pinho

- Wing length 1.85–2.06 mm; middle tibia with one preapical seta; Tergites I-V not as above......................... 12

12. Tibial comb with nine bristles.................................................. M. laudelinae Dantas & Hamada

- Tibial comb with seven bristles.......................................... M. paranaense Oliveira, Mendes & Silva

13. Tergite IX with four setae........................................................... M. iara Dantas & Hamada

- Tergite IX with 6–9 setae.............................................................................. 14

14. AR> 1.10; phallapodeme elongate, 57–63 μm long; gonostylus 110–123 μm long........... M. adeliae Dantas & Hamada

- AR <1; phallapodeme normal, 25–31 μm long; gonostylus 82–91 μm long...................................... 15

15. Wing> 1.20 mm; tibial comb well developed, with 9 bristles........................ M. macunaima Dantas & Hamada

- Wing <1.15 mm; tibial comb indistinct............................................ M. edentata Dantas & Hamada

16. Phallapodeme small, the length nearly 1/3 of gonocoxite..................................................... 17

- Phallapodeme reach the base of gonostylus, the length slightly shorter than gonocoxite............................ 18

17. AR 1.30; Tergites II-V with basal half brown infuscate.......................................... M. gesta (Roback)

- AR 0.8; Tergites II-V not as above...................................................... M. meilloni (Freeman)

18. Antenna with 13 flagellomeres, gonostylus wider at the base and tapering gradually to the apex....... M. zhengi Lin sp. n.

- Antenna with 15 flagellomeres, gonostylus apically wide..................................... M. robacki (Lehmann)