Parakiefferiella scandica

Author: Brundin, 1956

Diagnosis (Material in coll. ZSM; in part after Tuiskunen, 1986a - in italics)
Exuviae 2.3-2.9mm long (n=6).
Colour: Cephalothorax and abdomen uniformly weakly brownish.
Cephalothorax: Thoracic horn 65-88µm long (n=8), oval, with small setulae at least apically (058a.jpg); ThR 1.7-2.3 (n=6).
Abdomen: Median point patches present on segments (II)III-VI, never distinctly circular. Anterior transverse band strong, on tergite III (and usually II as well) with points stronger than those of the median and posterior bands, on IV as strong as, or nearly as strong as, those of the central part of the median patch, usually separated from these latter points by smaller points or a narrow gap (058b.jpg). Tergite VII usually with a few strong points just posterior to setae D5, being the remnants of the posterior transverse band. Well-developed pedes spurii B on II and III, well-developed pedes spurii A on sternites IV-VII. Abdominal segments with, at most, four lateral setae, short and straight.
Anal segment: Anal lobe ratio 2.6 (n=2). Anal lobes without fringe. Length of anal macrosetae 0.34-0.45x length of anal lobe (n=3). Apical projections of anal lobes at most a little longer than the distance from their origin to the base of segment IX. Apices of anal lobes at most with vague indications of teeth.

Species keys out at Page 748: Orthocladiinae 160 Parakiefferiella of the Text Key.

Widespread in (N+C) Europe (not Mediterranean).
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Northern lakes; streams further south.
Mainly inhabiting standing waters (arctic-subarctic lakes), but occasionally appearing in high mountain brooks. In Northern Scandinavia emerging in late June.