Author: (Holmgren, 1883)
Diagnosis (in part after Saether, 1989a)
Exuviae 3.6-4.7mm long (m=4.1mm, n=7) (062-2.jpg).
Abdomen: Tergites without longitudinal ridges posteriorly. Tergites II-VIII each with a posterior transverse row of teeth which may be flattened and contiguous, without a similar anterior transverse row. Tergites VI-VIII without a median circular patch of spinules. Sternites not armed posteriorly with teeth. Sternite I bare; II-III with median group of pointed points, with or without few and weak lateral points; IV-V bare or nearly so; VII-VIII with points in anterior half. Pedes spurii A present as bands on sternites I-VI, weak on I, stronger on II, complete bands in 5-7 rows on II-VI.
Anal segment: Sternite IX bare. Anal lobe ratio 1.5-1.8 (n=5). Anal lobes flat, without fringe or strong teeth along the lateral margins and not extended posteriorly into a downwardly curved point (062g.jpg). Only 2 spinous anal macrosetae on each anal lobe, 0.11-0.16x length of the anal lobe (n=6) (062h.jpg).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 782: Orthocladiinae 194 Metriocnemus of the Text Key.
Distribution
Holarctic species: montane and northern Europe.
(Saether, 1989a: p. 416 describes M. obscuripes var. (female, pupa, larva) from Madeira which may belong here.)
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Damp places by streams, pools and lakes.