Chironomus bharati Singh & Kulshrestha 1976

Has been listed as a synonym of C. circumdatus, but the anal point as described by Maheshwari from the original material, is quite different (see below).Redescribed by Maheshwari, 1989, who notes that the original description actually described the female of C.uttarpradeshesis by mistake.

Adult:

Male:
Head light brown, antenna yellow.  Thoracic vittae yellowish-brown; antepronotum light brown; scutum and scutellum pale green, postnotum light brown.
Wing with crossvein r-m dark.  Wing length 3.12 mm, VR 1.07.
Legs yellowish green, anterior tibia darker at proximal end; mid femora with apical hook-like projection; each tarsal segment with 5-18 prominent setae at distal ends.
Leg lengths (micron) and proportions:
 
Fe
Ti
Ta1
Ta2
Ta3
Ta4
Ta5
LR
F/T
Ta5/Ti
PI
1320
1200
2080
970
850
730
360
1.73
1.10
0.30
PII
1320
1230
740
430
290
180
140
0.60
1.07
 
PIII
1560
1530
1120
600
450
270
170
0.73
1.02
 

Abdominal terga II-V with well marked brown median spots; genitalia brown.


Male terminalia of C. bharati from Maheshwari (1989)

Hypopygium with spatulate anal point.  Inferior volsella extending about to distal swelling of anal point.  Gonostylus 1.44 time the length of the gonocoxite, with setae at distal end; only moderately swollen and narrowing gently from about the midpoint.  Superior volsella pointed at tip and strongly curved distally, perhaps closest to D(e) type of Strenzke 1959, base not broad. No setae shown on TIX.

Female: Colour similar to male but relatively weakly marked spots on tergites.
Wing length 2.70 mm, VR 1.06.
Head with frontal tubercles stated to be 35 mm long, but presumably should be 35 µm; antenna with 5 segments, lengths not given.  Palp proportions 9 : 15 : 59 : 63 : 91.
Leg lengths (micron) and proportions:

 
Fe
Ti
Ta1
Ta2
Ta3
Ta4
Ta5
LR
F/T
Ta4/Ti
PI
1030
860
1050
870
600
520
270
1.70
1.20
0.60
PII
1080
1080
600
360
240
150
130
0.55
1.00
 
PIII
1200
1240
910
520
400
240
160
0.73
0.97
 


Female terminalia of C. bharati from Maheshwari (1989)

Genitalia:  Sternite VIII not forms floor under vagina(?). Length of notum 224 ┬Ám.  Length of gonocoxal apodeme 132 µm, 17-19 setae on segment X, 5-6 setae om gonocoxite 6.  Labia sword shaped, 20.5 µm long.

Pupa: Body length 6.10 (6.00-6.20) mm.  General body colour dark brown, changing to sivery white near emergence.  Respiratory organ divided into two conspicuous multifilamentous anterior and posterior trunks.
Wing sheath well developed.  Spicules present.
No information on number of hooks on segment II, the number of spines on the spur of segment VIII or the taeniae of the swim fin.

Fourth instar larva: Body length 9.20 (9.00-9.40) mm.  Two pairs of ventral tubules.
Head capsule length 0.63 mm, width 0.48 mm.  RO 31 µm up from base of A1; antennal blade extends to near the distal end of A4; AR 1.56.
PE with single row of teeth, partly obscured, premandible with normal 2 teeth.
Mentum with 15 teeth, possibly Type II (4th lateral reduced almost to level of 5th lateral) centre tooth possibly Type III.
Ventromentum not illustrated.
Illustration suggests that mandible is type III and MTR about 0.33.


Mouthparts of C. bharati larva

Cytology: not known.

Found: Type locality - Khanari Agricultural Farm, Agra, Uttarpradesh.

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Revised: 19 September 2021
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Copyright © 2021, Jon Martin.