extinct species Amyzon brevipinne in his Fossil fishes in the collection of the United States National Museum. Research tapered off until a series of fish were collected in the Toroda Creek Graben northwest of Republic by R. C. Pearson during his compilation of the Geologic map of the Bodie Mountain quadrangle, Ferry and Okanogan Counties, Washington. The fossils were tentatively identified by paleoichthyologist David Dunkle as members of the genera Amyzon, Tricophanes, Erismatopterus and an undefined salmonid. Pearson sent almost all of the specimens collected to the Smithsonian, but the fossils were never accessioned into the collections there and are now considered lost. He did retain one fossil from the initial collection which was later donated to the USGS collections. The largest single work on the fish of the Okanagan Highlands was published by Mark Wilson in 1977 and covered fossils collected from the known British Columbian Okanagan Highlands fossil sites of the time. While not covering the Washington State fossils, Wilson named two of the species that are currently recognized from the Klondike Mountain Formation Amyzon aggregatum and Eosalmo driftwoodensis. Additionally scales attributed to the genus Amia were discussed and the genus Libotonius was named from fossils in the Allenby Formation. In the late 1960s a collection of fish from near the Tom Thumb Mine in Republic was compiled by resident R. Woodward. During the summers of 1976 and 1977 the University of Alberta conducted field collecting in both the Republic and Toroda Creek areas, along with the donation of the Woodward collection, yielded a number of fossil catostomids, along with a single percopsid, a salmonid, a hiodontid, and an Amia scale. The hiodontids were subsequently described as the species Eohiodon woodruffi in 1978 based on differences between the Tom thumb Tuff fossils and those found in British Columbian sites. A year later the percopsid fossils were also described as Libotonius pearsoni, extending the range of the genus south from the Allenby Formation. Bird fossils are limited to mostly isolated feathers that are preserved in the finer grained strata of the lake bed, though one partial bird skeleton has also been recovered. References Ypresian Stage Geology of the Rocky Mountains Paleogene geology of Washington (state) Paleontology in Washington (state)