Author: (Panzer, 1813)
Diagnosis (n=3 and in part after Murray and Ashe, 1981a - in italics)
Exuviae 9-10mm long (060-1.jpg).
Cephalothorax: Cephalic tubercles on frontal plate. Frontal setae absent. Thoracic horn 945-1070µm long, swollen in the basal third and gradually tapering to a point, with spines especially in the apical half (060b.jpg); ThR 7.6-10.0. Precorneal setae 3, median antepronotals 2, lateral pronotals 2, dorsocentral setae 4 and 1 mesonotal setae.
Abdomen: Tergite I without shagreen, tergites II-VI with strong shagreen over most of the surface, posteriorly with characteristic long teeth set on the apices of longitudinal cuticular ridges (060c.jpg). Tergites VII-VIII with strong shagreen especially on posterior border, tooth row reduced on tergite VII, absent on VIII. Hook row II situated immediately posterior of the long teeth, the hooks arranged in several rows.
Anal segment: Anal lobes flat, with weak shagreen along the anterior border, but strong teeth along the lateral margins, fringe and anal macrosetae absent; lobes not extended posteriorly into a downwardly curved point. Anal lobe ratio 1.93-2.06. Anal lobes with 4/5 apical taeniae (060d.jpg).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 771: Orthocladiinae 183 Eurycnemus of the Text Key.
Distribution
Palaearctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Rivers.