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Early eocene bat from wyoming.

Authors
  • Jepsen, G L
Type
Published Article
Journal
Science (New York, N.Y.)
Publication Date
Dec 09, 1966
Volume
154
Issue
3754
Pages
1333–1339
Identifiers
PMID: 17770307
Source
Medline
License
Unknown

Abstract

A fossil skeleton of an early Eocene bat, the oldest known flying mammal, was found in southwest Wyoming. The bat is assigned to the new species Icaronycteris index of the suborder Microchiroptera. It was apparently of a young male whose body was buried in varved marls of the Green River Formation, on the bottom of Fossil Lake, about 50 million years ago. The bones, some as slender as a human hair, show a few "primitive" characteristics such as a clawed index finger and a complete phalangeal formula, but the bat was fully developed -an anatomically precocious contemporary of the dog-sized polydactylous horse.

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