Key to families of Chiroptera in Korea

1 Nose-leaf present; tragus absent; antitragus well developed; premaxillae separated from surrounding bones except slender palatal branches.............................................................................. Rhinolophidae

- Nose-leaf absent; tragus present but reduced in size; premaxilla fused with neighboring bones......................... 2

2 Reduced tragus present; tail extending for between 1/3 to 1/2 of its length beyond margin of uropatagium; ears directed horizontally forward; fifth finger shorter than forearm.................................................... Molossidae

- Tragus present; tail enclosed within uropatagium or terminal one or two vertebrae project beyond margin of uropatagium; ears upright; fifth finger longer than forearm.................................................................... 3

3 Second phalanx third finger <3 times of first phalanx; 3 functional phalanges in third finger.............. Vespertilionidae

- Second phalanx third finger ±3 times length first phalanx; 2 functional phalanges in third finger............. Miniopteridae