Hydrotherikornis oregonus is an extinct species of auk. The fossil specimen was found near Coos Bay on the Oregon coast. It was found in 1926 and published in 1931. The distal tibiotarsus late Eocone fossil is one of the earliest examples of pan-Alcidae in North American.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0