Form described by Langton, 1991
Diagnosis (n=1)
Exuviae less than 7.0mm long.
Cephalothorax: Cephalic tubercles shallow rounded mounds with frontal setae. Thoracic horn about 10-16 branches; branches much shorter than half the length of the abdomen. Thorax with conspicuously large granules near suture (112b.jpg).
Abdomen: Length hook row II 0.61x width tergite; hooks 128; without an additional patch of small points or hooks at each end. Tergites II-VI with obvious anterior transverse bands of points stronger than those of the postero-median trapezoidal or rectangular marmorate patch with which they are broadly joined (122e.jpg). Tergite VII without trace of a median point patch. Tergites III and IV armed with a distinct apical band of large points or hooks. Sternite I without two antero-lateral armed humps. Pedes spurii B II well-developed. Conjunctives with points no larger than those of the anterior transverse bands of the tergites. Vortex present. Comb of segment VIII in the form of a long projecting toothed spur, with 9/7 teeth (122f.jpg). Segment IV without lateral taeniae. Segments V-VIII with well-developed lateral taeniae, no more than three on segment V.
Anal segment: Anal lobes with a dorsal seta set towards the inner edge of the lobe; each lobe with 46 fringe taeniae, fringe continued around the apex of the lobe and forward internally (122f.jpg).
Form keys out at Page 321: Chironomini 218 Polypedilum of the Text Key.
Distribution
(For more information see module IdentifyIt – file: Chironominae).
Ecological notes
A pool in a beech wood, England.