C. "pseudoppositus" Martin Chironomus alternans b - Martin and Porter 1977; Lentzios and Stocker 1979; Lentzios et al. 1980, Martin and Lee 1981 and 1984, Martin and Cranston 1995.
Chironomus pseudoppositus (manuscript name) - Martin 1974.
Chironomus pseudoppositus (nomen nudum) - Martin 1969b; Cranston and Martin 1989.In Bold BIN: BOLD:AAW3993 Adults are very similar to those of C. oppositus, but are generally smaller and darker in colour. Description of proposed holotype male. Male variability: Frontal tubercles variable, length about 23.7 (10-35) µm;, about 2.4 times longer than width at base. About 24.5 (19-34) clypeal setae; clypeal width about 0.6-0.8 of antennal pedicel diameter. Mean palpal proportions (micron): 52 : 66 : 199 : 224 : 354; P5/P4 1.5-1.71, P5/P3 1.71-1.95.
Thoracic setae: Achrostichal - abt. 14 (11-17), Dorsolateral - 15.9 (11-20), Prealar - 5.1 (3-8), Supraalar 1.5 (1-2); Scutellar - 2 approximate rows, Ant.- 4.8 (2-8) small, Post. - 13.7 (12-14) larger; total scutellar 17.3 (14-22).
Wing length 3.12 (2.95-3.38) mm, width at crossvein 0.74 (0.68-0.80) mm, VR. 0.94-0.97; Scf on brachiolum 2-3; setae on squamal fringe 24-27.
Mean leg lengths (microns) and proportions as follows:
| Fe
| Ti
| Ta1
| Ta2
| Ta3
| Ta4
| Ta5
| LR
| F/T
| BR
| PI
| 1258
| 1047
| 1805
| 922
| 746
| 648
| 289
| 1.5-1.8
| 1.14-1.37
| 1.6-2.1
| PII
| 1332
| 1166
| 743
| 405
| 297
| 192
| 143
| 0.58-0.63
| 1.04-1.14
|
| PIII
| 1484
| 1436
| 1069
| 595
| 463
| 284
| 172
| 0.69-0.75
| 0.96-1.08
|
| 
Male terminalia of C. 'pseudoppositus'.11.4 (7-16) setae on TIX in separate pale areas, 4-5+1 setae at tip of gonstylus which is as in holotype. Superior volsella generally of D-type, but occasionally E-type, as e to h of Strenzke (1959). Inferior Volsella and Anal point as in Holotype.Females:
Wing length 3.54 (2.8-4.2) mm; width at cross vein 1.03 (0.96-1.20) mm, VR 0.89-0.92; 3 or 4 SCf on brachioloum.
Head with frontal tubercles of variable length: 29.3 (19-48) micron; about 35.5 (27-55) clypeal setae. Mean antennal proportions (micron): 198 : 128 : 136 : 132 : 182; AR - 0.33 (0.29-0.40); A5/A1 - 0.95 (0.89-1.00). Mean palpal proportions: 59 : 61 : 208 : 245 : 377; P5/P4 1.57-1.83; P5/P3 1.83-2.10.
Thoracic coloration similar to males. Thoracic setae: Acrostichal abt. 15.8 (11-22; Humeral not counted; Dorsolateral (incl. Humerals) 27.2 (23-35); Prealar 6.2 (5-7); Supraalar 1; Scutellum, anterior row 11 (9-14), posterior row 13 (11-20)), total Scutellars 25 (20-34).
Mean leg lengths (microns) and proportions as follows:
| Fe
| Ti
| Ta1
| Ta2
| Ta3
| Ta4
| Ta5
| LR
| F/T
| Ta4/Ti
| PI
| 1568
| 1145
| 2310
| 1140
| 925
| 860
| 373
| 1.68-1.90
| 1.23-1.39
| 0.61-0.73
| PII
| 1546
| 1353
| 821
| 416
| 305
| 198
| 149
| 0.56-0.61
| 1.09-1.11
|
| PIII
| 1668
| 1669
| 1199
| 651
| 511
| 301
| 190
| 0.67-0.72
| 0.98-0.99
| |
BR - 1.6-1.7Abdomen similar to C. oppositus.Types: Holotype male: Asquith, New South Wales (33.68526°S, 151.11674°E), 20.ii.1963, (leg. J. Martin) (♂2)
Allotype female: Data as for Holotype. (♀3)
Paratypes: 3♂, 5♀, data as for Holotype, but various dates in 1963.
Type material currently in collection of Jon Martin, but will eventually be distributed to the ANIC and other institutions. Found: Australian Capitol Territory - Australian National University wildlife reserve.
New South Wales - Asquith (type locality); Cooranbong (33.08°S, 151.45°E)
Queensland - Auchenflower (27.48°S, 153.00°E); Mt. Ngungun.
South Australia - 1 Km n. Denial Bay; Middle Gorge, Flinders Range (32.11°S, 138.00°); Koppio; Eyres Waterhole, Streaky Bay;
Oratunga Creek, 20 km e. Parachilna (31.05°S, 138.55°E); Warren Gorge, 20 Km n. Quorn (32.11°S, 138.00°E); Tumby Bay.
Tasmania - Bakers Beach, 3 km nw Queenstown; 2.2 Km s. Killiecrankie Bay, Flinders Island.
Victoria - Aireys Inlet (38.47°S, 144.10°E); Armadale; Balwyn North(37.79052°S, 145.10037°E); Beechworth; Box Hill North
(39.82°S, 145.12°E); Bulleen (37.77577°S, 145.09552°E); 7 Km s. Castlemaine; Eildon (37.23°S, 145.92°E); Edwardes Lake, Reservoir; Frankston
(38.08°S, 145.08°E); Ringwood North; Templestowe Lower; Warburton; Warrandyte South; Wartook Reservoir, Grampians;
Melbourne Water Metropolitan Farm, Werribee.
New Zealand - there are records in BOLD of specimens from Waikato area, North Island (37.802°S, 175.334°E). Although classed as a nomen nudum, this species was described and types designated by Martin (unpublished Ph.D. Thesis 1966). [ Return to Index| Go to C. "pseudoppositus" immatures ] |