3015 Xyrauchen texanus (Abbott, 1860) Catostomidae Suckers Catostominae Cypriniformes Teleostei Razorback sucker North America: Formerly throughout medium to large rivers of Colorado River basin from Wyoming and Colorado in USA to Baja California in Mexico. Presently known only above Grand Canyon and in Lakes Mead, Mohave and Havasu on lower Colorado River in USA. AMNH 30848 Xyrauchen texanus AMNH 46093 Xyrauchen texanus AMNH 78027 Xyrauchen texanus AMNH 26367 1967 Xyrauchen texanus AMNH 46092 1967 Xyrauchen texanus AMNH 46918 1970 Xyrauchen texanus AMNH 46919 1970 Xyrauchen texanus AMNH 46920 1970 Xyrauchen texanus AMNH 55596 1981 Xyrauchen texanus