Hydrobaenus rufus

Author: (Kieffer, 1923)

Diagnosis (n=1, material in coll. ZSM)
Exuviae 4.2mm long.
Cephalothorax: Frontal setae on frontal apotome, 85µm long. Thoracic horn 325µm long; ThR 6.8. Thoracic horn small-toothed, not bifid or strongly jagged at apex.
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 8µm long. Points of apical band IV much smaller than 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 1.8. Fringe of anal lobe with 16 short taeniae, longest taenia 75µm long, 0.24x lobe length. Three anal macrosetae on each anal lobe, 0.77x lobe length.

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

C Europe, Middle East.
(For more information see module IdentifyIt – file: Orthocladiinae).