Form described by Langton, 1991
Diagnosis (n=1)
Exuviae 8.2mm long.
Cephalothorax: Thoracic horn 520µm long, rounded apically; the circular plastron plate connected to the atrium by one or two narrow necks (010e.jpg); plastron plate as wide as the horn, without rim; plate length 0.15 of horn length. ThR 4.3. Thorax with well-spaced, regular, transverse grooves from suture. No thorax comb.
Abdomen: Mark on segment I brown or blackish or absent. Conjunctives II/III-VI/VII shagreened. Seta D2 of segment IV posterior to the spinous seta D1 (010h.jpg). Setae D2 and D3 of segments III-V taeniate, simple to very branched, not hooked apically, less than half as long as the segment. Lateral taeniae of segments VII and VIII: 5, 5(4). Anterior lateral taenia of segment VII at 0.43 of length segment VII. Anterior lateral taenia of segment VIII at 0.65 of length segment VIII.
Anal segment: Anal lobe ratio 2.6. Anal lobes fringed with hair-like teeth externally only (but may be toothed internally).
Form keys out at Page 36: Tanypodinae 22 Macropelopia of the Text Key.
Distribution
Scotland.
(For more information see module IdentifyIt – file: Other subfamilies).
Ecological notes
Loch Venacher.