See here for proposed Holotype male.
Leg lengths (micron) and proportions as follows:
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Female:
Only three damaged specimens have been available for study, two with the head missing.
Wing length 3.19-3.53 mm; width at cross vein 0.83-0.90 mm, VR 0.83-0.93.$nbsp;$nbsp;About 2-3 SCf on brachiolum; 16 (14-18) setae on squamal fringe.
Head with frontal tubercles about 14 µm long and 13 µm wide; about 27-55 clypeal setae.
Antennal segments (microns): 190 : 127 : 147 : 121 : 215.$nbsp;$nbsp;AR about 0.37; A5/A1 about 1.13.
Thoracic setae - acrostichal about 13-17; dorsolateral about 32-44; prealar about 5; supra alar 1; scutellar in two approximate rows, 5 in anterior row; 11 in posterior row.
Leg proportions (micron)
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Differences from other members of the C. samoensis/flaviplumus group:
Important features of males are the AR of 2.4-2.9 (lower than that of C. flaviplumus, but similar to C. samoensis), LR of about 1.8-2.0 and fore Ta5, which is about 0.35-0.4 length of Ti. In Australia, it is the only presently known species with a beaked superior volsella.
In the female the fore legs are very long, with LR about 1.9, and Ta3 and Ta4 are about equal in length, only a little shorter than Ta2, ratio Ta4/Ti about 0.97
See here for descriptions of C. samoensis Edwards.
The Australian species is probably most closely related to the Japanese C. flaviplumus Tokunaga.
Molecular Sequence:
CO1 - GenBank accession nos. for Chinese specimens are KP902730 & -31, and for Thailand KT213029-038. In BOLD they have 99.5% similarity to an early release sequence named as ChironomidaeGC sp. 7 from Queensland, Australia.
Proposed type series: Holotype male: Radon Creek, Kakadu National Park ANT.15.3 Egg mass #3, reared male 3. Allotype female: details as holotype, female 1.
Found: Northern Territory - Radon Creek, Kakadu National Park; (12.75°S, 132.93°E); Twin Falls, off Jim Jim Road, Kakadu area
(13.00°S, 132.58°E).
Queensland - 3 km w. Sarina Beach (21.40°S, 149.25°E).
The species is also widespread in the Orient:
Bangladesh - Chittagong (22.4685°N, 91.7808°E)(BOLD)
China - Yangtze River basin (30.09°N, 115.12°E) (GeneBank)
Malaysia - Botanical Gardens, Univ. Malaya, Selangor (3.1295°N, 101.656°E)(BOLD)
Thailand - Mahasarakham University (16.242°N, 103.260°E), and Ban Keab (16.250°N, 103.210°E), Kantharawichai Dist., Maha Sarakham; Ban Tha Reu (15.303°N, 103.392°E), Satuek Dist. Buri Ram.
Indian specimens described by Chattopadhyuy et al. (1991), are not the same species and one has been renamed C. indiaensis (Martin 2011b), while others are the widespread species PK2.
Australian adults of this species can be bred in the laboratory, as fertile egg masses were obtained from adults reared from wild collected larvae. The related Japanese species has also been maintained in a laboratory culture (Elbetieha & Kalthoff 1988).