Orthocladius pe14

new form

Diagnosis (n=5 unless stated otherwise)
Exuviae 2.9-3.3mm long.
Cephalothorax: Frontal setae 76-110µm long. Thoracic horn elongate, 150-180µm long; ThR 6.1-8.0. Four dorsocentral setae, the first, third and fourth thick, the second conspicuously thinner.
Abdomen: Hook row II a discrete pad or band of hooks, length 0.28-0.34x width of segment II (n=4); hooks 49-59 (n=3). Tergites II-V normally with a postero-lateral patch of granules extending the hook row and apical bands to tergite margin; ventrally on segments I-V these may be complete across the sternites or medially broken (077c.jpg). Armament of tergites very variable, e.g. tergite III usually has a narrow irregular transverse median band, but occasionally the points cover the tergite except for bare anterior and postero-median areas. Median point bands of tergites III-VI very transverse; separate from the posterior band, joined to it laterally or joined to it medially as well, but usually distinct (077c.jpg). Points of median and posterior bands of much the same size and form. Posterior transverse point band on tergite III not extending further laterally than the apical band. Pedes spurii B conspicuous on segments II and III. Forked or branched setae rare and usually confined to the apical sternites. Lateral setae of the posterior segments short and thin.
Anal segment: Anal lobe ratio 1.7-2.0. Anal lobes with apical teeth; fringe absent; anal macrosetae 0.6-0.67x length of the anal lobe, usually strongly hooked at tip (077d.jpg).

Species keys out at Page 865: Orthocladiinae 276 Orthocladius of the Text Key.

(For more information see module IdentifyIt – file: Orthocladiinae).

Ecological notes