Key to the species of the Limnephilus bipunctatus Species Group in Turkey

Males

1 Intermediate appendages long, in lateral view directed caudad (Figs 2, 9)........................................ 2

- Intermediate appendages short, in lateral view directed dorsad (Figs 16, 23, 30, 37)................................ 3

2 Spinulose zone of tergite VIII in dorsal view 1/2 as long as broad (Fig. 9); preanal appendages roundly oval, 2.0 times as long as tall (Fig. 9); intermediate appendages in dorsal view narrow (Fig. 10)........................... L. transcaucasicus

- Spinulose zone of tergite VIII in dorsal view narrow, 1/3 as long as broad (Fig. 3); in lateral view, preanal appendages rather narrow and oval, 2.25 times as long as tall (Fig. 2); intermediate appendages in dorsal view broadly triangular (Fig. 3).............................................................................................. L. bipunctatus

3 Segment IX in lateral view narrow (longitudinally short), about as broad (long) as inferior appendages (Figs 16, 37); basoventral parts of intermediate appendages in caudal view thin (Figs 18, 39).............................................. 4

- Segment IX in lateral view broad (longitudinally long), much broader (longer) than inferior appendages (Figs 23, 30); basoventral parts of intermediate appendages in caudal view thick (Figs 25, 32)................................... 5

4 Spinulose zone of tergite VIII in dorsal view subrectangular, 3/5 as long as broad, with lateral lobes densely covered with spines (Fig. 17); intermediate appendages in lateral view almost as thick apically as basally and dorsal margins deeply concave basally (Fig. 16)................................................................................ L. bayburt sp. n.

- Spinulose zone of tergite VIII subelliptically trapezoidal, 1/3 as long as broad, without lateral lobes, sparsely covered with spines (Fig. 38); intermediate appendages in lateral view taperedeach with apical half slender and dorsal margins gradually concave along most of length (Fig. 37)....................................................... L.bercalan sp. n.

5 Intermediate appendages in lateral view subtriangular, broad basally, upcurved dorsal margins gradually concave over full length (Fig. 23); brachypterous.................................................................. L. malickyi

- Intermediate appendages in lateral view broad and dorsally convex in basal 2/3, narrower and dorsally concave in apical 1/3 (Fig. 30); fully alate......................................................................... L. caucasicus