FIGURES 12–17. Thremma sardoum Costa 1884, final instar larva. 12 in Discriminatory matrix for the larvae of the European Thremma species (Trichoptera: Thremmatidae)

FIGURES 12–17. Thremma sardoum Costa 1884, final instar larva. 12, prothorax, right ventrolateral (ae = anterolateral extension of prosternite; h = head; p = pronotum; pe = posterolateral extension of prosternite; ph = prosternal horn; pt = protuberance). 13, ventral protuberance of abdominal segment I, ventral (m = row of muscle attachment spots; sf = posterior spinule field; vs = ventral sclerite; dashed lines = mesal margins of ventral sclerites). 14, metathorax and abdominal segments I–III, right lateral (dg = dorsal gills; ls = lateral seta; sa3 = setal area 3; sf = posterior spinule field; vs = ventral sclerite; arrow = white patch within spinule field on lateral protuberance). 15, abdominal segment IX, dorsal (arrows = short lateral sclerite setae). 16, tip of abdomen, right lateral (ls = lateral sclerite of anal proleg; ac = anal claw). 17, case, ventral. Scale bars: 0.5 mm.