Chaetopteryx sahlbergi McLachlan 1876

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

Chaetopteryx sahlbergi McLachlan 1876 .

The first abdominal segment is densely covered by spiked setae, their total number on the first segment being no more than 40 ( Fig. 6B ). The gills consist of single filaments ( Fig. 6C ). The metanotum has two visibly separated anteromedial sclerites ( Fig. 6D ). One seta is present on each side of abdominal tergite IX ( Fig. 6E ). Secondary setae are absent on the femora of the middle and hind legs; there is only one seta on the basal half of each upper femur edge ( Figs 6F, 6G ). The larval case is a slightly curved conic tube, up to 1.5 cm long, constructed of short detrital sticks varying in length and embedded along the case ( Fig. 6H ). This species sporadically occurred in the assemblages of Trichoptera on water moss, but the numbers were low.

Figures

FIGURE 6. Larva and case of Chaetopteryx sahlbergi McLachlan 1876. 6A, habitus, dorsal; 6B, abdominal segment I, left lateral, dorsal, and right lateral; 6C, anterior abdominal segments, left lateral (dotted areas: single-filament gills); 6D, metanotum, dorsal (dotted oval: anteromesal sclerites); 6E, abdominal segment IX, ventral (dotted circles: setae); 6F, 6G right middle and hind legs, respectively, posterior faces (arrows: primary setae); 6H, case, right lateral. Scale bars 6A = 2 mm; 6B–6G = 1 mm; 6H = 1 cm.