Rheotanytarsus pe1

Form described by Langton, 1991

Exuviae 3.7-4.0mm long (n=3).
Cephalothorax: Frontal apotome smooth. Thoracic horn 263µm long, with setae apically; ThR 10.5 (n=1). Pearl row absent.
Abdomen: Tergites (II) III-VI with extensive shagreen; II-VI with well-developed anterior paired point patches. On tergites II and III the point patches are strongly transverse, rectangular. 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. Segment IV without taeniae laterally and V with either none or one on each side. Posterior segments with lateral taeniae, though these may be narrow.
Anal segment: Anal lobes without point patches, but with a long dorsal seta; each lobe with 10-13 fringe taeniae (n=3).

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

Iberian Peninsula.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Streams and a stream-fed pool.