Pseudokiefferiella parva

Author: (Edwards, 1932)

Diagnosis (Material in coll. ZSM)
Exuviae 4.1-5.5mm long (n=5) (027-2.jpg).
Cephalothorax: Frontal setae 135-160µm long (n=4). Thoracic horn 65-125µm long; ThR 5.7-11.5 (n=4) (027f.jpg). Precorneal setae 1-3: 89-250; 163-300; 60-88µm long (n=3).
Abdomen: Hook row II absent. Abdominal tergites without reticulation, extensively armed with small points; posterior points of tergites greatly enlarged to form a transverse row of teeth; sternites without a posterior tooth row. Abdominal segments II-VIII postero-laterally with a small projecting spur, progressively larger on succeeding segments (027-2.jpg).
Anal segment: Anal lobes with 3 macrosetae each and apically with a strong triangular tooth (027g.jpg). Anal lobe ratio 1.6-1.9 (n=3).

Species keys out at Page 538: Diamesinae 14 Pseudokiefferiella of the Text Key.

Palaearctic species: widespread in Europe.
(For more information see module IdentifyIt – file: Other subfamilies).

Ecological notes
Streams, at or near the source.