Ascaphus trui is the scientific name for the Tailed frog or the Coastal tailed frog. This frog species is found in the Pacific Northwest region of North America, particularly in the coastal areas of Alaska, British Columbia, Washington, and Oregon. Synonyms for Ascaphus trui are Ascaphus truei and Rana trui. The Tailed frog is unique because of its tailed structure, which is found in both male and female frogs. Synonyms are important in the scientific community as they allow for clear communication and understanding when discussing species and taxonomy. Knowing multiple synonyms for a species also helps researchers locate and identify relevant publications.