Author: (Kieffer, 1924)
Diagnosis
Exuviae 3.2-4.2mm long (n=9) (065-2.jpg).
Cephalothorax: Thoracic horn 255-410µm long (m=330µm, n=13); ThR 5.3-7.7 (m=6.4, n=13) (065k.jpg).
Abdomen: Posterior points of tergites III-V smaller, not elevated on a transverse swollen mound (065l.jpg); posterior points of tergite II not much smaller than those on tergite III. Male with a posterior transverse point row ventrally on VIII, absent in female. No lateral taeniae on segments III-VI. Lateral setae of segment VIII not taeniate, usually three strong, stiff, and one long, very thin; lateral setae of segment VII very thin.
Anal segment: Anal lobe ratio 1.5-1.9 (m=1.7, n=11). Fringe of anal lobe with 7-15 taeniae (m=12, n=18), taeniae as long as the anal macrosetae (065m.jpg).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 689: Orthocladiinae 101 Parametriocnemus of the Text Key.
Distribution
Holarctic species: widespread in Europe, also Canary Islands.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Streams.