A complete summary of Cordilleran sucker (Pantosteus bondi; Catostomidae) occurrence data in British Columbia, Canada / by Scott Gilmore, Cathryn Abbott, Rowshyra A. Castaneda, Liane Stenhouse, Alex Van... : Fs97-6/3759E-PDF

"Cordilleran Sucker (Pantosteus bondi) is a freshwater fish species known to occur in parts of the North Thompson, Similkameen, and Fraser rivers in British Columbia, Canada, that is assessed as threatened by COSEWIC. Geographic range information is vital for the conservation management of imperilled species. Cordilleran Sucker has undergone substantial taxonomic revisions through time and is morphologically similar to other species, thus historical records of its occurrence may not be based on correct taxonomic identification. It is possible that museum specimens currently relied on for this information were misidentified at the time of collection or reflect out of date taxonomic identifications. Indeed, there are inconsistencies in geographic distribution reports among data sources, including among COSEWIC documents, that require investigation. We comprehensively examined museum specimens and reviewed historical records of occurrence of Cordilleran Sucker in BC from available literature and databases to verify the accuracy of the species identification. Erroneous, misidentified records previously associated with this species and confirmed here to represent other species were found and marked for removal from the public record. Limited survey effort may also contribute to an incomplete understanding of the current distribution of Cordilleran Sucker in British Columbia, thus we tested eDNA metabarcoding as a possible survey method. This was done at three locations where Cordilleran Sucker was historically reported (two in the North Thompson River and one in the Fraser River), and positive detections were found at all three locations. This report summarizes the currently known distribution of Cordilleran Sucker based on all available data"--Abstract, page vi.

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