Propsilocerus paradoxus

Author: (Lundström, 1915)

Diagnosis (Material in coll. ZSM)
Exuviae 8.5, 8.8mm long (n=2) (037-1.jpg).
Cephalothorax: Frontal setae on praefrons, 55, 80µm long (n=2). Thoracic horn 640-760µm long, small-toothed, bifid at apex or irregularly jagged apically (037b.jpg); ThR 3.2-4.2 (n=2). Precorneal setae 1,2: 80; 100µm long (n=1). Median antepronotal setae 1,2: 140; 143µm long (n=1); lateral antepronotal setae 1,2: 130; 80µm long (n=1). Dorsocentral setae 1-4: 140; 155; 130; 135µm long (n=1).
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. Fourth lateral seta of segments III and IV thick and over 100µm long. Lateral setae 1-4 of segment IV: 50, 60; 105, 115; 40, 60; 115, 165µm long (n=2). Three or four lateral setae on segments II-VI, not taeniate; at least one lateral seta on segment VII, and all those on segment VIII taeniate.
Anal segment: Anal lobe ratio 1.6, 1.7 (n=2). Anal macrosetae 4-6 (n=2). Fringe of anal lobe with 34-46 taeniae; longest 120, 130µm, 0.17, 0.19x length of the anal lobe (n=2) (037c.jpg).

Species keys out at Page 635: Orthocladiinae 47 Propsilocerus of the Text Key.

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

Ecological notes
Stagnant water.