Robackia Saether, 1977

Mukherjee, Bindarika & Hazra, Niladri, 2022, First records of three genera, Cyphomella Saether, 1977, Olecryptotendipes Zorina, 2007 and Robackia Saether, 1977 of the Harnischia complex from India with description of O. extentus sp. n., O. obtunsus sp. n. and R. aequilongia sp. n. (Diptera: Chironomidae), Zootaxa 5091 (2), pp. 330-340 : 333

A world key to the species of the genus Robackia Saether (male)

(adopted from Yan et Wang 2006)

1. Anal point without any lateral setae, only with basal strong setae (Holarctic: United States, Canada, China)......................................................................................... R. demeijerei ( Kruseman, 1933)

- Anal point with weak lateral setae, with or without basal strong setae............................................ 2

2(1). Tergite IX with shoulders............................................................................... 3

- Tergite IX with posterior margin rounded................................................................... 4

3(2). Superior volsella swollen distally; anal point nearly parallel–sided (Palaearctic and Orient: former Yugoslavia, Italy, North Korea, Russia, China).............................................................. R. pilicauda Saether, 1977

- Superior volsella not swollen distally; anal point widened in apical 1/3 (Palaearctic: Russia)....... R. aculeata Zorina, 2003

4(2). Anal point constricted basally (Nearctic: United States).................................. R. claviger ( Townes, 1945)

- Anal point nearly parallel-sided.......................................................................... 5

5(4). AR 1.30; T IX with 4 strong dorsal setae; superior volsella digitiform with 1 subapical and 1 apical setae (Oriental China)............................................................................. R. parallela Yan et Wang, 2006

- AR 2.03–2.13; T IX without strong setae; superior volsella bilobed, inner part with 1 subapical and 1 apical setae (Orient: India)............................................................................... R. aequilongia sp. n.