Nanocladius rectinervis

Author: (Kieffer, 1911)

Exuviae 1.9-3.1mm long (m=2.5mm, n=18) (044-1.jpg).
Cephalothorax: Thoracic horn 165-230µm long (m=199µm, n=15), more parallel-sided, or at least widest well beyond base, with few teeth (044b.jpg); ThR 3.6-5.7 (m=4.7, n=10).
Abdomen: Hooks of hook row II short, strongly curved, crowded on a postero-median projection of the tergite. Apical point band on segment III entire, on IV entire or medially broken. Tergites III-VIII with restricted shagreen, at least on VII and VIII, with conspicuous large points medially and/or posteriorly. Median point patches present on tergites IV-VI, patches transversely elongate. Points of point patches small, the longest less than 30µm long, usually shorter than the longest tooth of the posterior transverse rows. Pedes spurii B on segment II conspicuously large, usually elongate conical in shape. Three or four lateral setae on segments II-VI, thin and hair-like (044c.jpg); lateral taeniae of segment VI-VIII: 1(0),4,5.
Anal segment: Anal lobes not drawn out posteriorly into a tooth or spur. Anal lobe ratio 1.2-1.5 (m=1.3, n=9). Anal lobe fringe of 14-26 taeniae (m=20, n=23). The three anal macrosetae situated apically on the anal lobes (044d.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 670: Orthocladiinae 82 Nanocladius of the Text Key.

Holarctic species: widespread in Europe, circum-Mediterranean.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Streams and occasionally lakes.