Potamophylax latipennis Curtis 1834

Konovalova, Daria A., Kislitsina, Nadezhda I. & Zotina, Tatiana A., 2023, Assemblages of Trichoptera larvae on water moss in the middle reaches of the Yenisei River (Siberia, Russia), Zootaxa 5306 (3), pp. 331-348 : 339

Potamophylax latipennis Curtis 1834 .

On abdominal tergite IX and the basal sclerites of the anal legs, there are no transparent spiked setae ( Figs 8A, 8E ). There are no light-colored spots behind the eyes ( Fig. 8B ). The metanotum bears two anteromedian sclerites that are spaced apart ( Fig. 8C ). Abdominal segment I bears the largest setae, each with a round sclerite at its base ( Fig. 8D ); the diameter of a round sclerite is greater than the thickness of its seta ( Fig. 8D ). Abdominal tergite IX is flanked by 2 or more lateral setae ( Fig. 8E ). No secondary setae are present on anterior and posterior surfaces of middle and hind femora ( Fig. 8F ). The basal half of the upper edge of each middle and hind femur bears a single large primary seta ( Fig. 8F ). The case is a slightly curved tube made of small roundish pebbles, with an oval dorsal side, up to 2.5 cm long ( Fig. 8G ). This species occurs only sporadically in samples of water moss.

Figures

FIGURE 8. Larva and case of Potamophylax latipennis Curtis 1834. 8A, habitus, dorsal; 8B, head, right lateral (dashed circle indicating the absence of light-colored spots behind the eyes); 8C, metanotum, dorsal view (dotted oval: sclerites); 8D, abdominal segment I, ventral (dashed oval: setae); 8E, abdominal segment IX, left lateral (dotted area: lateral setae); 8F, left hind leg, posterior face (arrow: primary seta); 8G, case, right lateral. Scale bars 8A = 2mm; 8B–8F = 1 mm; 8G = 2 cm.