Author: (Meigen, 1804)
Diagnosis
Exuviae 5.1-6.5mm long (m=5.8mm, n=14).
Cephalothorax: Thoracic horn 354-425µm long (m=383µm, n=14); ThR 2.3-2.9 (m=2.6, n=12). Plastron plate 145x88-166x156µm (n=7); length 0.21-0.38 of horn length (m=0.29, n=12). (017d.jpg)
Abdomen: Segments I-VII each with one long lateral taeniate seta and a very short seta inserted close to its base. Segments VIII and IX with short, hardly taeniate setae. Anterior lateral taenia of segment VII at 0.44-0.63 of length segment VII (m=0.54, n=9).
Anal segment: Anal lobe ratio 1.8-2.3 (n=9). Insertion of anterior anal taenia at 0.28-0.42 of lobe length (m=0.35, n=9). (017e.jpg)
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 71: Tanypodinae 57 Natarsia of the Text Key.
Distribution
Palaearctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Other subfamilies).
Ecological notes
Commonest in plant-filled pools in moorland, but widespread in standing water, even in the weedy margins of lakes.