Robackia demeijerei

Author: (Kruseman, 1933)

Diagnosis (Material in coll. ZSM)
Exuviae 3.8-4.1mm long (n=4) (107-1.jpg).
Cephalothorax: Cephalic tubercles and frontal setae absent.
Abdomen: Hook row II entire, length of row 0.49-0.58x width tergite (n=2); hooks 43-61 (n=4). Tergites II-V with median point patch and posterior band fused to form a nearly rectangular patch of strong points; on tergite VI the median patch and posterior band are separate, and there is a reduced patch on VII. Reticulation, particularly of posterior segments, very distinct (107b.jpg). Sternites I-(II)III with transverse spine rows, anteriorly and/or posteriorly. Conjunctives unarmed. Pedes spurii B absent. Comb of segment VIII absent. Lateral taeniae of segments V-VIII: 4,4,4,4.
Anal segment: Fringe of anal lobe with 27-34 taeniae (n=4) (107c.jpg).

Species keys out at Page 236: Chironomini 133 Robackia of the Text Key.

Holarctic species: NW Europe to Balkans.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Rivers: Bulgaria; Greece.