Heleniella serratosioi

Author: Ringe, 1976

Diagnosis (Material in coll. ZSM)
Exuviae 2.3-3.1mm long (n=3).
Cephalothorax: Thoracic horn elongate, 200-285µm long, pointed at tip and toothed; ThR 8.0-9.5 (n=3).
Abdomen: Anterior transverse bands of tergites II-IV narrow, of scale shagreen. Apical transverse bands of tergites II-IV composed of unmodified points. Tergites without longitudinal ridges posteriorly. Tergites II-VII or II-VIII each with a posterior transverse row of teeth which may be flattened and contiguous, without a similar anterior transverse row. Sternite I with a nearly circular patch of strong points on each side in the region of setae V3 and V4, which they may embrace (061a.jpg). Sternites II and III armed with strong spines anteriorly (060g.jpg).
Anal segment: Anal lobes flat, without strong teeth along the lateral margins and not extended posteriorly into a downwardly curved point. Anal lobe ratio 3.0, 3.3 (n=2). Anal lobes without fringe; with three apical setae which may be very reduced and difficult to see.

Species keys out at Page 775: Orthocladiinae 187 Heleniella of the Text Key.

(S)W+C Europe, Middle East.
(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes
Montane streams.