Author: Hirvenoja, 1973
Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 3.5-4.4mm long (n=3).
Cephalothorax: Cephalic tubercles absent; frontal setae between antennal bases, on frontal apotome or on praefrons, 70-125µm long (n=5). Antennal sheath base with a shallow conical granular mound. Thoracic horn 125-180µm long; ThR 7.2-10.8 (n=4) (091o.jpg).
Abdomen: Length hook row II 0.34-0.41 of width tergite II; hooks 50-81+ (n=4). Strong point patches on tergites III-VI, occasionally also on VII, anterior band kidney-shaped, often widely separated from the posterior band. Point patches absent on tergites VII and VIII. Pedes spurii B are present on segments II and III, but not strongly projecting on III. Dorsal setae I-VIII: 4,4,4,5,5,3,5,2(2); Lateral setae I-VIII: 1,3,3,3,3,5,3,4(5); Ventral setae I-VIII; 2,3(4),3(4),3(4),4,4,4,0; on VIII the first of the dorsal setae is situated so far lateral as to seem to belong to the lateral setae (apparently 5), in which case lateral seta 4 is larger than the others on that segment (091p.jpg) (N.B. occasionally the fourth lateral seta lies a little posterior to the fifth).
Anal segment: Anal lobe ratio 1.4 (n=1); fringe absent. Anal macrosetae more or less equally strong, length 0.67-0.82x length of the anal lobe (n=4).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 954: Orthocladiinae 365 Cricotopus of the Text Key.
Distribution
Holarctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Running and stagnant water.