Cricotopus pilosellus

Author: Brundin, 1956

Diagnosis (n=3; in part after Hirvenoja, 1973a - in italics)
Exuviae 4.6-5.5mm long.
Cephalothorax: Cephalic tubercles absent; frontal setae on praefrons. Antennal sheath base a little swollen, rounded, smooth. Thoracic horn 112-180µm long, smooth or with minute spinules apically; ThR 3.7-9.0. Precorneal setae not on conspicuous mounds.
Abdomen: Length hook row II 0.48 of width tergite II; hooks 64-89in 2-3 rows. Armament of tergite II not resembling that on III. Armament of tergites III-V extending into the antero-lateral corners past the anterior adhesion marks; median point patch of tergites III and IV widely separated from the posterior transverse band. Point patches absent on tergites VII and VIII. Small pedes spurii B present on segment II. Sternite III with a broad lateral longitudinal band of shagreen, to a greater or lesser extent joined anteriorly across the sternite, frequently interrupted leaving an isolated patch medially, occasionally without any trace of the anterior band. Five lateral setae on segment VIII; fourth lateral seta of segment VIII obviously much stronger than at least one of the other three. Dorsal setae I-VIII; 4-5,4-5,4-5,5,5,5,5,2; Lateral setae I-VIII: 1,3,3,3,3,3,3,4; Ventral setae I-VIII: 2(?1),4,4,4,4,4,4,1; lateral seta 4 on VIII stronger than the other lateral setae.
Anal segment: Anal lobe ratio 1.4-1.7. Anal lobes without fringe. All three anal macrosetae more or less equally strong, 0.40-0.53x lobe length.
(Linked adult male: Langton and Pinder, 2003a)

Note: Hirvenoja (1973) states that Cricotopus pilidorsum Hirvenoja has a nearly identical pupa, differing in the antero-lateral shagreen of sternite IV, that of pilosellus being somewhat more robust and less distinctly arranged in rows.

Species keys out at Page 939: Orthocladiinae 350 Cricotopus of the Text Key.

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

Ecological notes
Montane lakes.