Chaetocladius perennis

Author: (Meigen, 1830)

Exuviae 4.3-5.6mm long (n=9).
Cephalothorax: Frontal setae 73-100µm long (n=6). Thoracic horn elongate, 145-230µm long, small-toothed, pointed at apex; ThR 5.0-8.3 (n=11).
Abdomen: Tergite I unarmed, or with a small patch of points postero-laterally, and/or antero-laterally. Tergites II-VIII posteriorly with a conspicuous narrow transverse band of teeth, the remainder of the tergites covered with small points. Points of apical bands as large as those in mid-tergite on segments III-V. Lateral setae of segments II-VI of three sizes: first and third similar in diameter, stiff; the second narrower, longer and flexible; the fourth very narrow. Lateral setae 1-4 of segment IV: 85-125; 115-145; 78-130; 60-100µm long (n=6); 2 about two-thirds the diameter of 1 and 3; length longest seta 0.25-0.32x length IV (n=5).
Anal segment: Anal lobes rounded laterally, fringe absent; lobe with 3 apical macrosetae short and strong, spine-like, 75-135µm long (n=11); length 8.5-24x width lobe (n=5).
Note: Of type Chaetocladius pe1 Langton, 1984.
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 792: Orthocladiinae 204 Chaetocladius of the Text Key.

Holarctic species: widespread in Europe, eastern Mediterranean.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Streams, ditches and lakes in the south.