Chironomus pe27

new form

Exuviae 6.9, 7.8mm long (n=2).
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 LxB 80x56, 100x100µm (n=2). Frontal setae 44µm long (n=1). Basal ring of thoracic horn 120x60µm; tracheolar patch 84x20µm; 9 tracheoles across (n=1); 2.5µm in diameter. 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=2); hooks 79 (n=1). Armament of tergites II-VI not strongly waisted and with the posterior transverse band not successively increasing in extent to tergite VI; usually reduced on VI. Tergite VIII with points robust and mostly isolated. Sternite II armed with very fine shagreen, complete posteriorly. 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 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, 78 fringe taeniae (n=2).

Form keys out at Page 171: Chironomini 68 Chironomus of the Text Key.

Southern Spain.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Littoral wetlands.