Cricotopus trifascia

Author: Edwards, 1929

Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 4.4-5.5mm long.
Colour: Thorax and abdomen with a number of different shades of brown.
Cephalothorax: Cephalic tubercles absent, frontal setae on frontal apotome just anterior to mid-line between the antennal bases. Thoracic horn 100-195µm long (n=8), a small colourless tube, distally with a few soft spines (088i.jpg); ThR 5.9-10.7 (n=8). Thorax smooth.
Abdomen: Length hook row II 0.43-0.45 of width tergite II (n=6); hooks 88-123 (n=4) (088j.jpg). Pedes spurii B present on segment II. Anterior and posterior point patches on tergites III-VIII usually clearly separated. On tergite III the anterior points stronger than the posterior points, a reversal of the situation on the posterior segments. Dorsal setae I-VIII: 4,4-5,5,5,5,5,5,2; Lateral setae I-VIII; 1,3,3-4,4,4,4,4,4; Ventral setae I-VIII: ?0,4,4-5,4-5,4-5,4-5,4-5,0; other lateral setae on VIII almost as strong as lateral seta 4 (088k.jpg).
Anal segment: Anal lobe ratio 1.3-1.7 (n=3). Anal lobes without fringe. Inner anal macroseta weaker than the other two; length setae 0.93-1.13x length of the anal lobe (n=7) (088k.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 921: Orthocladiinae 332 Cricotopus of the Text Key.

Holarctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes