Eukiefferiella coerulescens

Author: (Kieffer, 1926)

Exuviae 1.9-2.3mm long (m=2.1mm, n=11) (051-1.jpg).
Cephalothorax: Thoracic horn small, thin-walled and sac-like. Median antepronotal setae 1,2: 40-50; 35-55µm long; precorneal setae 1-3: 60-67; 50-63; 45-55µm long; dorsocentral setae 1-4: 33-55; 27-40; 23-25; 23-30µm long (n=4). Pearl row absent.
Abdomen: Hook rows on tergites continuous; hooks III 14-17, IV 12-17, V 11-18 (n=7). Posterior teeth of tergites III-V short, only about as long as the bases of the hooks of the hook rows, not dense (051b.jpg); teeth III 10-13µm; IV 10-13µm long (n=4). Lateral setae of segment VIII short and fine.
Anal segment: Anal lobe ratio 1.5-2.6 (m=2.0, n=8). Anal lobes without fringe. Length of anal macrosetae 0.43-0.54x length of the anal lobe (n=4). Inner macroseta of anal lobes weaker than the other two (051c.jpg).
(Linked adult male: Langton and Pinder, 2003a)

Species keys out at Page 721: Orthocladiinae 133 Eukiefferiella of the Text Key.

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

Ecological notes
Northern and montane lakes and streams.