Palaeontology and geology of the Bridger Formation, southern Green River Basin, S.W. Wyoming, U.S.A. Part 8. Fish otoliths from the Twin Buttes Member, upper Bridger Formation

Screenwashing of fluviatile sediments of the Twin Buttes Member, upper Bridger Formation (middle Eocene) has yielded 439 fish otoliths. These are the first to be reported from this formation. From this lot a single specimen belongs to a fossil species of the genus Amia Linnaeus, 1758; the remaining 438 otoliths are referred to as ‘genus Percoideorum’ bridgerensis, a new species of percoid which should probably be placed in an extinct family.