Ascaphidae

2 species

1. 1Ascaphus montanus Mittleman & Myers, 1949 · Rocky Mountain
2. 2Ascaphus truei Stejneger, 1899 · Tailed Frog

Source: Catalogue of Life 2026-10-14 via ChecklistBank (sector: ITIS 2026-09-22 (COL sector for Amphibia; not ASW)), fetched 2026-10-18.