Compiled and Edited by:
Nancy B. Simmons and Andrea L. Cirranello
American Museum of Natural History

Your search for Myotis nigricans resulted in 1 species-level match:

Myotis Kaup, 1829. Skizz. Entwickel.-Gesch. Nat. Syst. Europ. Thierwelt 1: 106.

Vespertilio myotis Borkhausen, 1797

Myotis nigricans (Schinz, 1821).
Das Thierreich 1: 179.
Black Myotis