Thienemanniella vittata

Author: (Edwards, 1924)

Exuviae 1.7-2.3mm long (m=2.0mm, n=8).
Cephalothorax: Thoracic horn and pearl row absent.
Abdomen: Tergites VI-VIII armed with elongate overlapping spinules, about 10µm long, very different in form to the points on tergites III and IV; on V the points are intermediate in size (035c.jpg). Sternites II-VIII at most armed with small points, posterior points not conspicuously enlarged. Four lateral taeniae on segments III-VIII.
Anal segment: Anal lobe ratio 1.3-1.6 (m=1.4, n=7). Fringe of anal lobe with 35+1 to 47+1 taeniae (m=41+1, n=7). Apical setae of anal lobes cylindrical, hooked apically.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 598: Orthocladiinae 10 Thienemanniella of the Text Key.

Widespread in Europe, Middle East.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Montane lakes and streams.