Thienemannimyia laeta

Author: (Meigen, 1818)

Diagnosis (in part after Fittkau, 1962a, p. 177, figs. 118, 120, 121, 123, 126)
Cephalothorax: Thoracic horn narrow, cylindrical, gently curved to the pointed apex (013b.jpg); horn surface with numerous small spines; horn about 10x as long as wide, horn atrium tube-like, with rounded seive-plate; thoracic comb weak; dorsocentrals 1-3: 90, 100, 40 µm long, distance between dorsocentrals 2 and 3 is twice the distance from either with dorsocentral 1.
Abdomen: Tergite I granulate/tuberculate, resembling thoracic armament (012h.jpg). Lateral taeniae of segments I-VIII 4,6,6,6,6,6,5,5 (013c.jpg , segment I). Lateral taeniae 4-6 of segments II-VI equidistant (013g.jpg); the fourth lateral taenia of segments II-VI smaller and narrower than the rest. Segment VII with 2 anterior lateral taeniae and 3 equidistant lateral taeniae in the posterior third or quart; on VIII anteriormost seta at ± 1/3.
Anal segment: Anal macrosetae of normal length; anterior seta at ± 0.35 of lobe length; both setae in anterior half; margin of lobe not toothed; female genital sheaths slightly extended beyond median margin of lobe.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 44: Tanypodinae 30 Thienemannimyia of the Text Key.

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

Ecological notes
A running water species of southern streams.