National Park Service 3-2013 THE EARLIEST KNOWN FISHER ( MUSTELIDAE ) , A NEW SPECIES FROM THE RATTLESNAKE FORMATION OF OREGON

@inproceedings{Samuels2017NationalPS,
  title={National Park Service 3-2013 THE EARLIEST KNOWN FISHER ( MUSTELIDAE ) , A NEW SPECIES FROM THE RATTLESNAKE FORMATION OF OREGON},
  author={Joshua X. Samuels and Jennifer Cavin},
  year={2017}
}
Fishers are elusive carnivorans, with few occurrences in the fossil record. The origin and early evolution of fishers is unclear, but they likely originated in Asia. A new record of Pekania from the Rattlesnake Formation of Oregon represents the earliest known occurrence of a fisher, more than 5 million years earlier than other records in North America. This specimen has an unambiguous derived trait shared with other members of the genus, an external median rootlet on the upper carnassial. The… CONTINUE READING