Author: (Kieffer, 1916)
Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 2.9-4.2mm long (m=3.5mm, n=22).
Cephalothorax: Cephalic tubercles absent; frontal setae on praefrons, just anterior to mid-line between the antennal bases. Antennal sheath base with an obvious, usually yellowish, granular conical mound (091h.jpg). Thoracic horn 75-165µm long (m=103µm, n=14); ThR 4.4-9.1 (m=7.1, n=13) (091g.jpg).
Abdomen: Length hook row II 0.42, 0.47 of width tergite II (n=2); hooks 36-73 (m=53, n=10) (091i.jpg). Shagreen on tergites II-VI, anterior and posterior point patches separate, anterior patches kidney- or crescent-shaped. Point patches absent on tergites VII and VIII. Pedes spurii B weakly developed on II, absent on III. Dorsal setae I-VIII: 4,4,4,5,5,5,5,2; Lateral setae I-VIII; 1,3,3,3,3,3,3-4,4; Ventral setae I-VIII: 1,4,4,4,4,4,4,0; other lateral setae on VIII almost as strong as lateral seta 4 (091j.jpg).
Anal segment: Anal lobe ratio 1.8-2.2 (n=4). Anal lobes without fringe. Anal macrosetae more or less equally strong; length 0.65-0.83x length of the anal lobe (n=8).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 953: Orthocladiinae 364 Cricotopus of the Text Key.
Distribution
Holarctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Slow flowing and stagnant water.