Key to male imagines of the genus Bryophaenocladius from the Neotropical region

1. Anal point equilateral triangle-shaped..................................................................... 2

– Anal point isosceles triangle-shaped...................................................................... 4

2. Pseudospurs absent........................................................... B. carolinae Donato. Argentina

- Pseudospurs present................................................................................... 3

3. Inferior volsella digitiform; megaseta without teeth; mid leg with weak comb............... B. digitatus Saether. Mexico

- Inferior volsella knob-like; megaseta with several teeth; midleg without comb.................................................................................................. B. pichinensis Wang, Andersen et Saether. Mexico

4. Palp with 4 short palpomeres................................................ B. carus (Roback) . Panama, Brazil

– Palp with 5 well-developed palpomeres.................................................................... 5

5. Third palpomere with digitiform projection............................ B. simplex Wang, Andersen et Saether. Mexico

– Third palpomere without projection....................................................................... 6

6. Pseudospurs present............................................. B. humerosus Wang, Andersen et Saether. Mexico

- Pseudospurs absent.................................................................................... 7

7. Wing membrane without microtrichia.................................................. B. nasus sp. n. Argentina

- Wing membrane with microtrichia at least visible at 100x of magnification....................................... 8

8. Wing with anal lobe well developed; virga simple, truncated at the end; inferior volsella rounded.............................................................................................. B. virgotrunctatus sp. n. Argentina

- Wing without anal lobe; virga with two spines, rounded at the end; inferior volsella low....... B. urbanus sp. n. Argentina.