Cricotopus intersectus

Author: (Staeger, 1839)

Diagnosis (in part after Hirvenoja, 1973a - in italics)
Exuviae 2.9-4.5mm long (m=3.7mm, n=39) (084-2.jpg).
Cephalothorax: Frontal setae on frontal apotome, 170-255µm long (n=8). Thoracic horn 145-215µm long (m=172µm, n=18); ThR 4.4-7.8 (m=6.2, n=18). Precorneal setae arise from conspicuous mounds (084f.jpg). Thoracic horn often with rather strong spines, horn apically pointed; Thorax dorsally granulate.
Abdomen: Length hook row II 0.47-0.65 of width tergite II (m=0.54, n=8); hooks 60-98 (n=8), hooks in 2-3 rows. Pedes spurii B present on both segments II and III, but small on III, wrinkled or granulate at least on II (084g.jpg). Shagreen at least laterally reduced on tergites. Point patches on tergite II weaker than on III-VI, on latter tergites the anterior and posterior point patches separate. Point patches absent on tergites VII and VIII. Dorsal setae I-VIII: 4,4,4,5,5,5,5,2; Lateral setae I-VIII: 1,3,3,3,3,3,34; Ventral setae I-VIII: 1,3-4,3-4,3-4,4,4,4,1; lateral seta 4 on VIII not stronger than other lateral setae.
Anal segment: Anal lobe ratio 1.4-1.8 (n=4). Anal lobes without fringe. Length of anal macrosetae 0.53-0.72x length of the anal lobe (m=0.62, n=10) (084h.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 900: Orthocladiinae 311 Cricotopus of the Text Key.

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

Ecological notes
Lakes, ponds, drains and slow flowing rivers.