Onychonycteris
Videos
Onychonycteris was the more primitive of the three oldest bats known from complete skeletons, having lived in the area that is current day Wyoming during the Eocene period, 52.5 million years ago.
Onychonycteris finneyi Fossil Butte National Monument
Restoration
Icaronycteris
Videos
Icaronycteris is an extinct genus of microchiropteran bat that lived in the early Eocene, approximately 52.2 million years ago, making it the earliest bat genus known from complete skeletons, and the
Onychonycteris
…solving the problem of how primitive bats evolved flight without the ability to navigate at night using echolocation. Onychonycteris occurs alongside Icaronycteris index, previously thought to be the most primitive known bat species, and Icaronycteris gunnelli…
Icaronycteris fossil at AMNH
Fossil holotype of Icaronycteris gunnelli dorsal view
Restoration of I. index