Author: (Meigen, 1818)
Diagnosis (n=4)
Exuviae 8.0-10.1mm long.
Cephalothorax: Thoracic horn 550-685µm long, more or less truncate apically; ThR 1.69-2.5 (009i.jpg). Plastron plate occupying the whole apex and in contact with the atrium for its whole width; plate without rim, length 0.27-0.40 of horn length. Thorax with well-spaced, regular, transverse grooves from suture. No thorax comb.
Abdomen: Mark on segment I of two parallel dark lines joined anteriorly and diverging posteriorly (009j.jpg). Conjunctives II/III-VI/VII shagreened. Seta D2 of segment IV posterior to the spinous seta D1. Setae D2 and D3 of segments III-V taeniate and longer than the segment, hooked apically, sometimes angularly bent back on themselves about half-way along their length (010h.jpg). Lateral taeniae of segments VII and VIII: 5, 5(4). Anterior lateral taenia of segment VII at 0.32-0.40 of length segment VII, lateral taeniae 2 and 3 close together at about 0.7 of segment length and 4 and 5 close together at apical corner (009k.jpg). Anterior lateral taenia of segment VIII at 0.36-0.46 of length segment VIII.
Anal segment: Anal lobes fringed externally only with hair-like teeth (but may be toothed internally). Anal lobe ratio 2.54-2.75.
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 37: Tanypodinae 23 Macropelopia of the Text Key.
Distribution
Widespread in Europe.
(For more information see module IdentifyIt – file: Other subfamilies).
Ecological notes
Ponds, ditches, spring flushes.