new form
Diagnosis
Exuviae 3.6-4.7mm long (m=4.0mm, n=8); usually very transparent, sometimes a little infuscated.
Cephalothorax: Cephalic tubercles elongate conical (136c.jpg), 40, 50µm long (n=2). Frontal setae may be taeniate, 88-110µm long (n=5). Precorneal setae taeniate, inserted on a conspicuous swelling. Thoracic horn rounded at tip, 160-220µm long (n=5), margined along one edge and at tip with setae 90-120µm long (n=3), length longest seta 0.47-0.67x length of horn (n=3); ThR 5.6-7.9 (n=3). Pearl row absent.
Abdomen: Tergites II-VI each with an anterior pair of point patches; ArR II-VI 0.64-1.0 : 0.95-1.25 : 1.0 : 0.88-1.06 : 0.67-0.91 (m=0.75 : 1.07 : 1.0 : 0.93 : 0.77, n=8). Points on segment IV 62-90µm long (m=74µm, n=8). The postero-lateral corner of segment VIII bears a comb of teeth 50-80µm wide (m=61µm, n=8); marginal teeth 6-10 (m=7.8, n=8). Lateral taeniae V-VIII: 3,3,4,5.
Anal segment: Fringe of anal lobe with 31-42 taeniae (m=36.3, n=8).
Form keys out at Page 416: Tanytarsini 58 Cladotanytarsus of the Text Key.
Distribution
Scotland.
(For more information see module IdentifyIt – file: Chironominae).
Ecological notes
A lake.