Oxyethira, Eaton, 1873

Wells, Alice & De Moor, Ferdinand C., 2020, Hydroptilidae (Trichoptera) of Angola, a new genus, seven new species, and five new records, Zootaxa 4868 (4), pp. 495-514 : 503

Oxyethira larvae

Material examined. ANGOLA: 1 cased larva, 1 free, [CAW 784M], Moxico Province, small unnamed tributary of Tempué River, Site 15—tributary of Cuenovale River , vegetation, -13.4428, 18.8749, 12/xi/2016, I.S. Ferreira; 2 cased larvae, [CAW 786B], Moxico Province, Cuando River , Site 16— Cuando source lake (outflow and lake), vegetation, mud, -13.0038, 19.12725, 13/xi/2016, I.S. Ferreira; 1 empty pupal case, [CAW 794L], Moxico Province, Cuando River , Site 19— Cuando River headwater site, vegetation, sand, -13.0043, 19.14684, 15/xi/2016, I.S. Ferreira; 1 cased larva, [CAW 797H], Moxico Province, Cuando River , Site 20— Cuando River longbridge at village, MV, sand, -13.0923, 19.35946, 16/xi/2016, I.S. Ferreira .

Remarks. All larvae collected were in their 5 th (final) instar. The cases are the characteristic flattened flask shape, comprising two tightly joined valves. The larvae are recognised by their general form, with body laterally compressed and mid- and hind legs 1.5 to 2X length of forelegs (see Marshall 1979 for full details). Oxyethira larvae are usually found in slower-flowing waters among filamentous green algae, upon which they are reported to feed ( Marshall 1979).