Orthocladius calvus

Author: Pinder, 1985

Diagnosis (n=3) (in part after Soponis, 1990a - in italics)
Exuviae 6.0-6.1mm long (069-2.jpg).
Cephalothorax: Frontal apotome without strongly projecting tubercles. Antennal sheath base without a sharp tooth. Thoracic horn 80-95µm long, oval, shortly petiolate; ThR 1.7-1.9.
Abdomen: Hook row II B 0.14-0.21x width tergite II. Segments without anterior point patches. Tergites II-V with apical bands of small, anteriorly directed hooks or spines. Pedes spurii B absent; pedes spurii A on IV or V to VII.
Anal segment: Anal lobes without fringe and macrosetae.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 843: Orthocladiinae 254 Orthocladius of the Text Key.

(S)W Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
A primary coloniser of temporary streams.