Key to the species of male Fissocantharis with filiform antennae from Taiwan

1. Pronotum with a large black marking in middle, elytra light yellow............................. F. fl a v i p e n n i s sp. nov.

- Pronotum without any black marking, elytra black........................................................... 2

2. Antennomeres III–VII each with a small rounded excavation in middle................. F. pingtungensis (Wittmer, 1982)

- Antennomeres III–VII simple, without excavations........................................................... 3

3. Aedeagus: conjoint dorsal plate of parameres distinctly shorter than ventral process of each paramere..................................................................................................... F. formosana (Pic, 1910)

- Aedeagus: conjoint dorsal plate of parameres as long as ventral process of each paramere......... F. minor (Wittmer, 1997)