Rheotanytarsus rioensis

Author: Langton and Armitage, 1995

Diagnosis (Type material)
Exuviae 3.0-3.9mm long (n=4).
Cephalothorax: Frontal apotome smooth. Thoracic horn 223-258µm long, without setulae (135b.jpg); ThR 6.4-7.9 (n=4). Pearl row absent.
Abdomen: Tergites II-VI with anterior well-developed paired point patches, on tergites II and III the point patches are circular, longitudinally oval or, at most, a little broader than long, transversely broad oval; no posterior transverse point band on tergite II. Shagreen on tergites II-VI more extensive, especially on anterior tergites, extending the length of the tergite (135a.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: 1,3,3,3,2/3.
Anal segment: Fringe of anal lobe with 27-31 taeniae (n=4).

Species keys out at Page 404: Tanytarsini 47 Rheotanytarsus of the Text Key.

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

Ecological notes
An irrigation conduit, Tenerife; streams.