Author: (Kieffer, 1916)
Diagnosis
Note: of type Chaetocladius pe2a Langton, 1984.
Exuviae 3.3, 3.5mm long (n=2).
Cephalothorax: Frontal setae 68µm long (n=1). Thoracic horn 135-225µm long; ThR 5.9-9 (n=3). Thoracic horn elongate, small-toothed, pointed at apex.
Abdomen: Lateral setae 1-4 of segment IV: 80-120; 110-135; 98-110; 50-80µm long (n=3); 2 about 0.6-0.8 the diameter of 1 and 3, 4 very narrow; length longest seta 0.32-0.38 length IV (n=3). The second lateral seta of segment IV over half the width of the first and third, and about one third the length of the segment. Most of the points on the pleura of segment IV similar in size to those on the tergite. Posterior transverse tooth rows of sternites III-VIII continuous, or broken medially, the colourless teeth intermittently dispersed across the sternites. Two of the lateral setae of segments II-V short and spine-like. Points of apical bands smaller than those in mid-tergite on segments III-VI. (Tergite I armed at least antero-laterally.) Posterior transverse bands of teeth on tergites conspicuous. Tergites II-VIII posteriorly with a weak to well-developed narrow transverse band of teeth, the remainder of the tergites covered with small points.
Anal segment: Anal lobes rounded laterally, fringe absent. Anal lobes rounded with the apical macrosetae short and strong, spine-like, 58-125µm long (n=3); length 8.5-15x width (n=3).
(Linked adult male: Langton and Pinder, 2003a)
Species keys out at Page 797: Orthocladiinae 209 Chaetocladius of the Text Key.
Distribution
Widespread in Europe.
(For more information see module IdentifyIt – file: Orthocladiinae).
Ecological notes
Streams and lakes.