Cricotopus pe13

new form

Note: No satisfactory distinction between the pupal exuviae of the included two taxa (Cricotopus polaris (Kieffer) and Cricotopus tibialis (Meigen)) has been found.
Exuviae 4.2-6.4mm long (m=5.25mm, n=33).
Cephalothorax: Cephalic tubercles absent; frontal setae on praefrons, 85µm long (n=1). Antennal sheath bases with an obvious conical, somewhat granular mound. Thoracic horn 70-250µm long (m=161.8µm, n=26), toothed apically; ThR 3.3-11.2 (m=8.0, n=25). Precorneal setae not on conspicuous mounds, usually one seta different from the other two (090k.jpg). Thorax at most very weakly granulate.
Abdomen: Length hook row II 0.46-0.57x width tergite II (n=8); hooks 62-89 (n=12). Armament of tergite II not resembling that on III. Median transverse point band of tergite III larger, extending anteriorly into the 2nd quarter of the tergite. Armament of tergites III-V extending into the antero-lateral corners past the anterior adhesion marks; median and posterior transverse bands rarely joined completely, usually narrowly separated for at least part of their breadth (090l.jpg); on tergite VI, if the median and posterior bands are joined, it is on each side, not in the middle, the points of the median band noticeably larger than the antero-lateral shagreen. Apical transverse bands of tergites III-V composed of points. Point patches absent on tergites VII and VIII. Pedes spurii B on segment II and III small or absent (090l.jpg). Five lateral setae on segment VIII, fourth seta obviously much stronger than at least one of the other three.
Anal segment: Anal lobe ratio 1.7-2.2 (n=4). Anal lobes without fringe. Anal macrosetae more or less equally strong, length of setae 0.46-0.54x length of anal lobe (n=5).

Form keys out at Page 938: Orthocladiinae 349 Cricotopus of the Text Key.

(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Streams, seepages, pools and lakes.