Rheotanytarsus rhenanus

Author: Klink, 1983

Exuviae 3.1-3.8mm long (n=12).
Cephalothorax: Frontal apotome smooth. Thoracic horn 200-288µm long, with setae apically (134m.jpg); ThR 4.1-11.0 (n=11). Pearl row absent.
Abdomen: Tergites (II) III-VI with extensive shagreen; II-VI with well-developed anterior paired point patches, on II and III strongly transverse, rectangular (134n.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: 0,0/1,2/3,4,4 (weakly taeniate), V with either none or one on each side.
Anal segment: Anal lobes without point patches and dorsal setae; each lobe with 19-30 fringe taeniae (n=12).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 409: Tanytarsini 51 Rheotanytarsus of the Text Key.

Widespread in Europe (not Scandinavia).
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes