Lithotanytarsus emarginatus

Author: (Goetghebuer, 1933)

Diagnosis (Material in coll. ZSM)
Exuviae 2.5-2.9mm long (n=7) (127-2.jpg).
Cephalothorax: Cephalic tubercles short, rounded cones; frontal setae absent (127g.jpg). Thoracic horn 420-450µm long, horn setulated from basal two-fifths to tip, the longest setae about as long as the horn is maximally wide (127h.jpg); seta 35-45µm long; ThR 8.4-11.3 (n=3).
Abdomen: Hook row II 0.43-0.48x width tergite (n=3); hooks 78, 86 (n=2). Tergites II to V with an anterior transverse band of dense small points; on II to IV also with a postero-median pair of point patches which are much less dense and joined to the anterior transverse band to a greater or lesser degree on each side of the mid-line (127i.jpg). Pedes spurii B II very weak. Segment VIII without a postero-lateral comb or spur. Lateral taeniae of segments V-VIII: 0,0,0,0.
Anal segment: Anal lobes without trace of a fringe or apical seta (127j.jpg).

Species keys out at Page 359: Tanytarsini 2 Lithotanytarsus of the Text Key.

W Europe, Morocco.
(For more information see module IdentifyIt – file: Chironominae).

Ecological notes
Limestone streams.