Form described by Langton, 1991
Diagnosis
Exuviae 4.2-5.5mm long (n=4).
Cephalothorax: Frontal setae on frontal apotome. Thoracic horn smooth, 170-219µm long; ThR 5.0-9.2 (n=3) (086i.jpg). Thorax nearly smooth. Precorneal setae not on conspicuous mounds.
Abdomen: Length hook row II 0.62 of width tergite II (n=1); hooks 102-219 (n=3). Pedes spurii B absent. Apical spinule band of tergite III absent and replaced by brown blotches on the cuticle (sometimes small points are present at each end of the band) (086j.jpg). Point patches absent on tergites VII and VIII.
Anal segment: Anal lobe ratio 1.5, 1.8 (n=2). Anal lobes without fringe. Length of anal macrosetae 0.28-0.34x length of lobes (n=3).
Form keys out at Page 912: Orthocladiinae 323 Cricotopus of the Text Key.
Distribution
W. Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Lakes, pools and rivers.