Macropelopia nebulosa

Author: (Meigen, 1804)

Exuviae 8.2-10.3mm long (m=9.2mm, n=12).
Cephalothorax: Thoracic horn 825-1415µm long (m=1183µm, n=8); ThR 2.7-3.1 (m=2.9, n=9) (009g.jpg). Plastron plate 0.44-0.55 of horn length (m=0.51, n=8), plate as wide as the horn, without rim. Thorax with well-spaced, regular, transverse grooves from suture. No thorax comb.
Abdomen: Mark of segment I very vague, if discernible, brown or blackish. Tergites II-V with a transverse posterior band of larger teeth about one third the breadth of the segment. Conjunctives II/III-VI/VII shagreened. Seta D2 of segment IV anterior to the spinous seta D1 (010g.jpg). Seta D3 on segments (III)IV and V long, flattened and hooked apically. Lateral taeniae of segments VII and VIII: 6(7), 5. Anterior lateral taenia of segment VII at 0.11-0.28 segment length (m=0.24, n=12) (009h.jpg).
Anal segment: Anal lobe ratio 2.1-2.6 (m=2.4, n=12). Anal lobes fringed externally only with hair-like teeth (but may be toothed internally).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 33: Tanypodinae 19 Macropelopia of the Text Key.

Widespread in Europe and circum-Mediterranean.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Rivers, ponds and lakes in shallow water, possibly penetrating into deeper water in northern lakes.