Hassianycteris
Hassianycteris is an extinct genus of Early Eocene to Middle Eocene bats from the Hassianycterididae with four or five known species: the type, H. magna, and H. revilliodi, all found in the Messel pit, Germany, H. kumari, found in the Cambay Shale Formation, India, and the possible fifth species "H." joeli, found in the Kortijk Clay Formation, Belgium, which may instead belong to Onychonycteridae. The Messel bats Palaeochiropteryx and Hassianycteris are the first fossil mammals whose colouration has been discovered: both were reddish-brown when alive.