Hydrobaenus lunzensis

Author: (Gouin, 1942)

Diagnosis (Material in coll. ZSM)
Exuviae 3.5-4.2 (n=6).
Cephalothorax: Frontal setae on frontal apotome, 80-125µm long (n=6). Thoracic horn 290-350µm long (n=6), small-toothed, horn not bifid or strongly jagged at apex.; ThR 4.1-6.4 (n=5). Second dorsocentral seta much longer than the first, third 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-IV, not taeniate; lateral taeniae of segments V-VIII: 1-3,2-4,4,4 (n=3), taeniae narrow, about 4µm wide.
Anal segment: Anal lobe ratio 1.6-2.0 (n=3). Fringe of anal lobe with 5-18 short taeniae (n=6); longest 58-68µm, 0.17-0.27x length of the anal lobe (n=5). Three anal macrosetae on each anal lobe, 0.8x length of the anal lobe (n=3).

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

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

Ecological notes
Trout ponds and a stream in Austria.