Key to males of Takiyaella gen. nov.

1. Forewing with black macula on fourth apical cell (Fig. 1D); pygofer not expanded apically (Fig. 1E); connective Y-shaped (Fig. 1H); aedeagal shaft with apical portion not expanded laterally (Fig. 1J– K) ............................................................................................................ T. anomala gen. et sp. nov.

– Forewing without black macula on fourth apical cell (Figs 3D, 7D); pygofer expanded apically (Figs 5E, 8E); connective V-shaped (Figs 5H, 10G); aedeagal shaft with apical portion expanded laterally (Figs 7K, 8K) ...................................................................................................................... 2

2. Aedeagus with apex spatulate, lateral margins bearing small spiniform projections (Figs 3K, 8K, 10J) ................................................................................................................................................... 3

– Aedeagus expanded apically forming a small lateral process on each side (Figs 5K, 7K) ................ ........................................................................................................................................................... 5

3. Pygofer strongly expanded apically, dorsal margin without distinct lobe (Fig. 8E); aedeagus short, shaft flattened laterally on basal half, atrial processes, in lateral view, posterior to shaft curvature (Fig. 8J) ................................................................................................ T. mejdalanii gen. et sp. nov.

– Pygofer moderatelly expanded apically, dorsal margin with distinct lobe (Figs 3E, 10D); aedeagus long, shaft tubular on basal half, atrial processes, in lateral view, anterior or parallel to shaft curvature (Figs 3J, 10I) ..................................................................................................................................... 4

4. Aedeagus with atrial processes parallel to shaft and following its curvature (Fig. 3J) ...................... ............................................................................................................... T. cavichiolii gen. et sp. nov.

– Aedeagus with atrial processes anterior to the shaft curvature (Fig. 10I) .......................................... ................................................... T. sexguttata (Chiamolera & Cavichioli, 2003) gen. et comb. nov.

5. Aedeagus with two pairs of atrial processes (Fig. 5J–K) ......... T. coelhomarquesae gen. et sp. nov.

– Aedeagus with a pair of bifid atrial processes (Fig. 7J–K) ........................ T. daniela gen. et sp. nov.