Rheotanytarsus pellucidus

Author: (Walker, 1848)

Diagnosis (n=4)
Exuviae 3.0-3.4mm long.
Cephalothorax: Frontal apotome granulate. Thoracic horn 470-585µm long; ThR 13.4-19.5 (134j.jpg). Pearl row absent.
Abdomen: Tergites II-IV with anterior point patches and II with an additional pair of small patches posteriorly (134k.jpg). The postero-lateral corner of segment VIII bears a simple, cleft or toothed spur, or three spurs, of which the outermost is the strongest and bent as a hook. Lateral taeniae of segments IV-VIII: 1,3,3/4,4,5.
Anal segment: Fringe of anal lobe with 37-43 taeniae.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 399: Tanytarsini 42 Rheotanytarsus of the Text Key.

Holarctic species: widespread in Europe, north Africa.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Northern streams and lakes.