Hydrobaenus lugubris

Author: Fries, 1830

Diagnosis (Material in coll. ZSM)
Exuviae 4.6-5.6mm long (n=5).
Cephalothorax: Frontal setae on frontal apotome, 80, 95µm long (n=2). Thoracic horn 333-393µm long (n=4), small-toothed, horn not bifid or strongly jagged at apex; ThR 4.2-5.8 (n=4).
Abdomen: Both anterior transverse apodemes of segment II complete. 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, e.g. median points of tergite IV 12µm long. Points of apical band IV about as strong as those on III. Three or four lateral setae on segments II-VI, not taeniate; lateral taeniae of segments VI-VIII: 2,4,4.
Anal segment: Anal lobe ratio 1.4-1.9 (n=4). Fringe of anal lobe with 15-23 short taeniae; longest 63-80µm long (n=5), 0.16-0.21x length of the anal lobe (n=4). Three anal macrosetae on each anal lobe, 0.61-0.92x length of the anal lobe (n=4).

Species keys out at Page 642: Orthocladiinae 54 Hydrobaenus of the Text Key.

Widespread in Europe (not Mediterranean).
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Ponds, pools and the margins of rivers.