Author: Zetterstedt, 1850
Diagnosis
Exuviae 6.9-7.8mm long (n=3).
Colour: Contrast in colour between thorax and abdomen not so strongly marked: specimens dark anteriorly also have the abdomen infuscated; outer margin of the anal lobes coloured except at base.
Cephalothorax: Cephalic tubercles elongate, curved; LxB 80x56, 100x100µm (n=2). Frontal setae 32, 44µm long (n=2). Basal ring of thoracic horn 120x60, 128x60µm; tracheolar patch 84x20, 100x26µm; 10, 12 tracheoles across; 2.5µm in diameter (n=2). Tracheolar patch of thoracic horn without an "eye". Thoracic granulation strong anteriorly, elsewhere reduced to reticulate markings or absent.
Abdomen: Hook row II entire, length of row 0.38-0.46x width tergite (n=3); hooks 73, 79 (n=2). Armament of tergites II-VI not so strongly waisted and with the posterior transverse band not successively increasing in extent to tergite VI; usually reduced on VI. Points of tergite VIII small and mostly arranged in oblique rows forming a vague reticulation. Shagreen of sternite II with a gap between the lateral shagreen and the median patch. Sternites III and IV without shagreen. Parasternite II with shagreen; III without shagreen; IV may have a few minute points in posterior half. Pleura of segment IV spinulate. Comb of segment VIII with 1 stout long apiculate tooth, set on the end of an elongate ventral cuticular mound which exceeds appreciably the apico-lateral corner of the segment. Lateral taeniae of segments V-VIII: 4,4,4,5.
Anal segment: Anal lobes weakly rounded. Anal lobe with 76-86 fringe taeniae (n=3).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 171: Chironomini 68 Chironomus of the Text Key.
Distribution
NW Europe.
(For more information see module IdentifyIt – file: Chironominae).
Ecological notes
Shallow stagnant water.