Heterotrissocladius maeaeri

Author: Brundin, 1949

Diagnosis (Material in coll. ZSM)
Exuviae about 4mm long.
Cephalothorax: Cephalic tubercles absent. Thoracic horn small-toothed. Wing sheaths without pearl row.
Abdomen: Armed tergites with small points which are gradually a little larger posteriorly on each segment (040a.jpg). Tergites without a median transverse row of strong points. Pedes spurii A present on segments IV-VI, absent on VII. Pedes spurii B of segment II narrow, about as high as wide. Postero-lateral corner of segment VII rounded. Sternite of male armed with a posterior band of conspicuous points along the evenly curved posterior margin; of female with a pair of triangular projections, each stiffened with an embedded spine (039h.jpg). Three or four lateral setae on segments II-VI, not taeniate; segment VII with three lateral taeniae, and all lateral setae on segment VIII taeniate.
See Saether, 1975d.

Species keys out at Page 627: Orthocladiinae 39 Heterotrissocladius of the Text Key.

Holarctic species: Fennoscandia.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Northern lakes.