Author: Kieffer, 1909
Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 3.7, 4.7mm long (n=2) (083-2.jpg) (5-6mm long).
Cephalothorax: Cephalic tubercles and frontal setae absent. Thoracic horn 360µm long (n=1), without spines, very large, curved, and very dark; ThR 7.2 (n=1). Thorax smooth to weakly granulate.
Abdomen: Length hook row II 0.47 of width tergite II (n=1). Pedes spurii B II absent. Tergites II-VII uniformly shagreened, on VIII and IX only an anterior triangular shagreen field (083-2.jpg). Dorsal setae I-VIII: 5,5,5,5,5,5,5,2; Lateral setae I-VIII: 1,3,3,3,3,3,3,4; Ventral setae I-VIII: 2,5,5,5,5,5,5,2. lateral seta 4 on VIII not stronger than the other lateral setae.
Anal segment: Anal lobes without fringe. Each anal lobe with a near terminal group of 3 anal macrosetae, about half as long as the lobe.
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 897: Orthocladiinae 308 Cricotopus of the Text Key.
Distribution
Palaearctic species: widespread in Europe, north Africa.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Streams and northern lakes. The larvae mine the leaves of Potamogeton natans Linn..