Key to the males of the Corynoneura group

1. Small size; wing length less than 1.3 mm. Wing with clavus where R1 and R2+3 are fused with costa. Corynoneura group ............................................................................................................................................................................ 2

- Small to large size; wing without clavus ....................................................................................................... not keyed

2. Anal point weak; median lobes of antepronotum strongly reduced ......................... Physoneura Ferrington et Saether

- Anal point absent; antepronotum usually not reduced.................................................................................................. 3

3. Eyes hairy; R4+5 apically joining costa and continuing as “false vein” to the wing tip (Harrison 1997, Fig. 3).... Noto- cladius Harrison

- Eyes hairy or bare; R4+5 apically not joining costa (Saether & Kristoffersen 1996, Figs 1, 2)...................................... 4

4. Palp with one palpomere; gonostylus without megaseta (Mendes et al. 2004, Figs 1, 9); wing with distinct punctua- tion. ............................................................................................................................................ Ichthyocladius Fittkau

- Palp with five palpomeres; gonostylus with megaseta; wing with fine punctuation.................................................... 5

5. Sternapodeme inverted V or U-shaped; hind tibia usually strongly expanded distally; eyes bare. ............................... ................................................................................................................................................... Corynoneura Winnertz

- Transverse sternapodeme not as above; hind tibia not strongly expanded; eyes bare to hairy. ................................... 6

6. Tergites II–V with raised, median circular group of setae and few lateral setae (Epler & de la Rosa 1995, Fig. 2 E); eyes bare, sternapodeme with strong oral projections ........................................ Tempisquitoneura Epler et de la Rosa

- Tergites II–V not as above; eyes hairy or bare; sternapodeme with or without strong oral projections. .................... 7

7. Sternapodeme usually with strong anteriolateral projections; inferior volsella strong; superior volsella low but dis- tinct; eyes bare; tergites with row of setae.................................................................... Onconeura Andersen et Saether

- Other character combination......................................................................................................................................... 8

8. Eyes bare; head with right-angled dorsolateral region; terminal flagellomere with triangular apex surrounded by sen- silla chaetica; transverse sternapodeme without oral projections. ............................................. Ubatubaneura n. gen.

- Eyes usually hairy; head shape and apex of antenna not as above; transverse sternapodeme with or without oral pro- jections ..................................................................................................................................... Thienemanniella Kieffer