Key to species of Genus Myotis in Korea

1 Forearm> 45 mm; orange pelage; wing membrane black.............................................. M. rufoniger

- Forearm <45 mm; brown to gray pelage.................................................................... 2

2 Stiff hairs present on uropatagium margin........................................................ M. bombinus

- Stiff hairs absent on uropatagium margin................................................................... 3

3 Posterior uropatagium margins form acute angle............................................................. 4 - Posterior uropatagium margins form obtuse angle............................................................ 5

4 Plagiopatagium inserted in middle or bottom of sole of upper heel or lower tibia...................... M. macrodactylus

- Plagiopatagium attached at middle of ankles.......................................................... M. petax

5 Length of tibia> 18 mm; forearm 35–42 mm ................................................... M. longicaudatus

- Length of tibia <17.5 mm ............................................................................... 6

6 Dog-leg blood vessel on uropatagium (Fig. 22).................................................... M. ikonnikovi

- Straight blood vessel on uropatagium............................................... ‘ M. sibiricus (or M. davidii)*

*For identification of M. sibiricus and M. davidii, molecular analysis is needed (Tsytsulina et al. 2012).