Hydrobaenus conformis

Author: (Holmgren, 1869)

Diagnosis (Material in coll. ZSM)
Exuviae 3.9-5.5mm long (n=5).
Cephalothorax: Frontal setae on frontal apotome, 70-125µm long (n=4). Thoracic horn 383-455µm long, small-toothed, horn not bifid or strongly jagged at apex; ThR 3.6-5.5 (n=5). Second dorsocentral seta not so much longer than the first and fourth.
Abdomen: Tergites without a median transverse row of strong points. Tergites III-V between the dorsal setae with more or less evenly distributed small points, which are gradually a little larger posteriorly on each segment. Three or four lateral setae on segments II-VI, not taeniate; lateral taeniae of segments V-VIII (1)2,2,4,4, taeniae (unpleated) 6-8µm wide.
Anal segment: Anal lobe ratio 1.5-1.9 (n=4). Fringe of anal lobe with 12-24 short taeniae; longest 50-95µm, 0.16-0.26x length of the anal lobe (n=5). Three anal macrosetae on each anal lobe, 0.7-0.95x length of the anal lobe (n=5).

Species keys out at Page 637: Orthocladiinae 49 Hydrobaenus of the Text Key.

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

Ecological notes
Northern cold lakes.