Saetheria sacculifera ( Chaudhuri & Chattopadhyay, 1990 ) Mukherjee & Hazra, 2023

Mukherjee, Bindarika & Hazra, Niladri, 2023, Taxonomic studies on Harnischia complex from India (Diptera: Chironomidae), Zootaxa 5278 (2), pp. 239-263 : 253-254

Saetheria sacculifera ( Chaudhuri & Chattopadhyay, 1990) Comb. n.

Paracladopelma sacculifera Chaudhuri & Chattopadhyay, 1990: 161 ; Hazra, Niitsuma and Chaudhuri, 2016: 85.

Diagnostic characters. Anal point spoon-like at apex; superior volsella is somewhat flattened pad-like, composed of dorsal and ventral lobes and each lobe bearing one seta.

Remarks. Based on the original description and illustration, following corrections have been made: anal point spoon-like at apex; superior volsella somewhat flattened pad-like, divided into dorsal and ventral lobes and each lobe bearing one seta.

Distribution. India, West Bengal (present record).

A world key to the species of the genus Saetheria Jackson (male)

1. Superior volsella without a digitiform projection............................................................ 2

- Superior volsella with a digitiform projection............................................................... 6

2(1). Superior volsella irregularly broadened apically; anal point with a cone-like process at base (Australasia)............................................................................................. S. angusta (Freeman, 1961)

- Superior volsella variable shaped; anal point without cone like structure.......................................... 3

3(2). Anal tergite band separated medially (Oriental China).......................... S. separata Yan, Saether & Wang, 2011

- Anal tergite band medially fused......................................................................... 4

4(3). Dorsal lobe of superior volsella bare (Palaearctic)............................... S. glabra Yan, Saether & Wang, 2011

- Dorsal lobe of superior volsella setose..................................................................... 5

5(4). Superior volsella pad-like to pediform; gonostylus with digitiform projection at apex (Oriental China)........................................................................................... S. digita ( Yan, Jin & wang, 2008)

- Superior volsella short, broad and pubescent bearing 1 seta; gonostylus long and little incurved (Orient: India)....................................................................... S. sacculifera ( Chaudhuri & Chattopadhyay, 1990)

6(1). Anal point drop shaped (Palaearctic)............................................... S. tamanipparai (Sasa, 1983)

- Anal point variable shaped.............................................................................. 7

8(7). Digitiform projection of superior volsella small, 14–20 µm in length............................................ 9

- Digitiform projection more or less elongated............................................................... 10

9(8). Superior volsella roughly triangular in form, ventral seta arranged in middle; gonostylus narrowed in middle (Palaearctic).................................................................................... S. reissi Jackson, 1977

- Superior volsella elongated foot-shaped, ventral setae arranged in apical third; gonostylus narrowed in proximal third (Holarctic)........................................................................ S. tylus ( Townes, 1945)

10(8). Ventral lobe of superior volsella foot shaped; 1 seta on superior volsella placed apically (Oriental China)...................................................................................... S. digitata Yan, Saether & Wang, 2011

- Ventral lobe of superior volsella triangular like; 1 seta on superior volsella placed subapically (Orient)........................................................................................................ S. circinata sp.n.