Chironomus alternans c - Martin and Lee 1981 and 1984; Martin and Cranston (1995)
C. 'jacksoni' Guryev et al. (2001)
Males: Wing length about 3.64 - 3.72. Frontal tubercles present, length about 25 - 33 micron. About 28 - 30 clypeal setae. Palpal proportions (microns): 70 : 75 : 205 : 220 : 335. Thorax generally green with yellow brown stripes; thorax pruinose. Thoracic setae: about 13 achrostichals; 13 - 16 dorsocentrals; 4 - 6 prealars; scutellars in two rough rows, 2 - 9 in anterior row, 12 - 14 in posterior row. Legs yellowish green, unbanded. Wings with anterior veins hardly darker than posterior, crossvein slightly darkened.
Leg lengths (microns) and proportions as follows:
|
|
Fe |
Ti |
Ta1 |
Ta2 |
Ta3 |
|
PI |
1345 |
1115 |
1790 |
980 |
790 |
|
PII |
1400 |
1300 |
800 |
465 |
335 |
|
PIII |
1615 |
1650 |
1170 |
680 |
530 |
|
|
Ta4 |
Ta5 |
LR |
F/T |
BR |
|
PI |
630 |
280 |
1.57-1.64 |
1.19-1.22 |
1.57-1.92 |
|
PII |
225 |
160 |
0.61 |
1.08 |
|
|
PIII |
325 |
185 |
0.71 |
0.97-0.99 |
|
Abdomen greenish with dark saddle spots on anterior segments, but whole of segments 6, 7 and 8 dark; about 9 - 11 setae on 9th tergite.
Types: Holotype male: Bellerive, Tasmania (-42.83; 147.33) AT.9. Allotype female: Data as for holotype. Paratypes: ? males, ? females, data as for Holotype, but various dates; also chromosome squashes with larval bodies mounted on same slide.
Holotype, allotype and some paratypes will be lodged in the Australian National Insect Collection.
Found: Tasmania - Bellerive.
Victoria - Squeaky Beach, Wilsons Promontory.