Monopelopia tenuicalcar

Author: (Kieffer, 1918)

Exuviae 2.8-4.0mm long (m=3.4mm, n=9; probably low as 8 reared; 1 wild caught 4.0mm long) (021-1.jpg).
Cephalothorax: Thoracic horn 265-395µm long (n=9), with rounded basal tubercle; ThR 3.8-5.0 (m=4.4, n=7). Thoracic horn flattish, toothed, elongate, gradually narrowed to the rounded apex; plastron plate occupies the whole of the horn apex, length 0.37-0.44x horn length (m=0.41, n=11), connected by a short neck to a thick-walled, unbranched, straight atrium, which occupies half to two-thirds the width of the horn lumen (021b.jpg). Thorax comb absent.
Abdomen: Tergite I with a median mark. Segment VII transversely rectangular. Anterior lateral taenia of segment VII at 0.33-0.53 of length segment VII (m=0.47, n=11). Anterior lateral taenia of segment VIII at 0.26-0.47 of length segment VIII (m=0.33, n=11). Many dorsal setae of the abdomen branched.
Anal segment: Anal lobes without a thickened lateral edge. Anal lobe ratio 2.4-3.1 (m=2.8, n=11). Insertion of anterior anal taenia not beyond 0.45 lobe length. (021c.jpg)
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 82: Tanypodinae 68 Monopelopia of the Text Key.

Holarctic species: widespread in Europe, Canary Islands.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Ditches and marshes; rare in the north.