Thienemanniola ploenensis

Author: Kieffer, 1921

Diagnosis (Material in coll. ZSM)
Exuviae 3.9-4.5mm long (n=4) (127-1.jpg).
Cephalothorax: Cephalic tubercles large conical, 75µm high; frontal setae 100, 140µm long (n=3). Antennal sheath with a large rounded-conical swelling (127b.jpg). Thoracic horn 388-525µm long; ThR 8.5-9.7 (n=4) (127c.jpg). Posterior thoracic mound swollen. Thorax antero-dorsally armed with strong spinous tubercles, the remainder of the anterior thorax densely granulate.
Abdomen: Length hook row II 0.39, 0.5x width tergite (n=2); hooks 105-124 (n=4). Tergites IV-VI with a narrow median longitudinal point patch, widest anteriorly, tapering to a point at about two-thirds segment length (127d.jpg). Comb of segment VIII absent. Lateral taeniae of segments V-VIII: (1)2-4,3/4,3/4,3/3, taeniae short, but broad.
Anal segment: Anal lobe ratio 1.3 (n=1). Anal lobes posteriorly bearing a short fringe of 8-17 setae (n=4) (127e.jpg).

Species keys out at Page 360: Tanytarsini 3 Thienemanniola of the Text Key.

NW continental Europe.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes