FIGURES 28–33. Thremma spp., final instar larvae. 28–31, Thremma anomalum McLachlan 1876 in Discriminatory matrix for the larvae of the European Thremma species (Trichoptera: Thremmatidae)

FIGURES 28–33. Thremma spp., final instar larvae. 28–31, Thremma anomalum McLachlan 1876, final instar larva: 28, detail of right lateral protuberance (sa = spinule area); 29, abdominal segment IX, dorsal; 30, tip of abdomen, right lateral; 31, case, right ventrolateral. 32–33, Thremma gallicum McLachlan 1880, final instar larva: 32, head, frontal; 33, head, ventral. Scale bars: 0.5 mm.