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According to Simmons & Geisler 1998, [7] Icaronycteris is the first genus, followed by Archaeonycteris, Hassianycetris, and Palaeochiropteryx, in a series leading to extant microchiropteran bats. [8] Rietbergen et al. 2023 found Onychonycteris to be sister to the North American species of Icaronycteris.
The same erosional forces responsible for the Permian and Mesozoic gaps in Michigan's rock record were active during the ensuing Paleogene and Neogene periods of the Cenozoic era. [2] As such, no Cenozoic fossils older than the Pleistocene are known from Michigan. [1] Nevertheless, Michigan has many deposits made during the Quaternary period.
Onychonycteris finneyi was the strongest evidence so far in the debate on whether bats developed echolocation before or after they evolved the ability to fly. O. finneyi had well-developed wings, and could clearly fly, but lacked the enlarged cochlea of all extant echolocating bats, closely resembling the old world fruit bats which do not echolocate. [1]
The two oldest-known fossil skeletons of bats, unearthed in southwestern Wyoming and dating to at least 52 million years ago, are providing insight into the early evolution of these flying mammals ...
This list of the prehistoric life of Michigan contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of ...
A 69-million-year-old skull found in Antarctica belonged to what scientists say is the oldest known modern bird.. An early relative of the continent’s ducks and geese, it lived off the Antarctic ...
Onychonycteridae is an extinct family of bats known only from the early Eocene of Europe and North America. The type species, Onychonycteris finneyi, was described in 2008 from two nearly complete skeletons found in the Green River Formation of southwestern Wyoming. [1]
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