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.