Polypedilum acifer

Author: Townes, 1945

Diagnosis (Material in coll. ZSM)
Exuviae 3mm long (n=1).
Cephalothorax: Cephalic tubercles small rounded mounds. Frontal setae 40, 55µm long (n=2). Thoracic horn of a few (about 10) branches, branches of thoracic horn much shorter than half the length of the abdomen. Thorax with conspicuously large granules near suture (112b.jpg).
Abdomen: Length hook row II 0.48, 0.6x width tergite (n=2); hooks 46-54 (n=3). Tergites II-VI with obvious anterior transverse bands of points stronger than those of the median patch with which they may be confluent for the tergite width. Tergites III and IV armed with an apical band of points or hooks. Tergite VII without trace of a median point patch. Sternite I without two antero-lateral armed humps. Pedes spurii B II present. Conjunctives with points no larger than those of the anterior transverse bands of the tergites. Vortex present. Comb of segment VIII extended as a short golden spur, with at least the apical tooth broad and blunt (124q.jpg). Segment IV without lateral taeniae; V-VIII with well-developed lateral taeniae, no more than three lateral taeniae on V.
Anal segment: Fringe of anal lobe with 17-25 taeniae (n=3). Anal lobes with a dorsal taenia set just inwards of the fringe.

Species keys out at Page 313: Chironomini 210 Polypedilum of the Text Key.

Holarctic species: widespread in Europe and circum-Mediterranean.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Streams with moderate to rapid flow; Tunisia, (former) Yugoslavia.