Chironomus pe30

new form

Exuviae 8.0, 8.4mm 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 110x80-120x85µm (n=2). Frontal setae 60µm long (n=1). Basal ring of thoracic horn 180x80-190x100µm; tracheolar patch 140x40-150x60µm (n=2); 14 tracheoles across (n=1); 2.3µm in diameter. Tracheolar patch of thoracic horn without an "eye". Thorax reticulate.
Abdomen: Hook row II entire, length of row 0.44, 0.5x width tergite (n=2); hooks 70, 72 (n=2). 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. Sternite II with a gap posteriorly between the lateral longitudinal bands and the median patch. Sternites III and IV with an anterior transverse band of fine shagreen broken medially. Pleura of segment IV spinulate. Comb of segment VIII with 1, 2 long apiculate stout teeth, set on the end of an elongate ventral cuticular mound which exceeds appreciably the apico-lateral corner of the segment. Lateral taeniae on segments V-VIII: 4,4,4,5.
Anal segment: Anal lobe with 92, 96 fringe taeniae (n=2).

Form keys out at Page 176: Chironomini 73 Chironomus of the Text Key.

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

Ecological notes
Littoral wetlands.