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Table of Contents <br />Endemic Species of the Colorado River System <br />Page <br />Definitions of Terms. .................. ................ 11 <br />..............................................................Map <br />FAMILY: Ambystomidae <br />Tiger Salamander - Ambystoma tigrinum .........................................13 <br />FAMILY: Bufonidae <br />Colorado River Toad - Bufo alvarius ...................................... .........14 <br />Western Toad - Bufo boreas .................................................. .........14 <br />Great Plains Toad - Bufo cognatus ........................................ .........14 <br />Green Toad - Bufo debilis ..................................................... .........14 <br />Southwestern Toad - Bufo microscaphus ................................ .........15 <br />Red-Spotted Toad - Bufo punctatus. ...................................... ....... . .15 <br />Sonoran Green Toad - Bufo retiformis .................................... .........15 <br />Woodhouse's Toad - Bufo woodhousei ................................... .........15 <br />FAMILY: Microhylidae <br />Great Plains Narrow-Mouthed Toad - Gastrophyrne olivacea ... .........16 <br />FAMILY: Pelobatidae <br />Plains Spadefoot - Scaphiopus bombifrons ............................. .........16 <br />Couch's Spadefoot - Scaphiopus couchi ................................. ........16 <br />Western Spadefoot - Scaphiopus hammondi ........................... .........16 <br />Great Basin Spadefoot - Scaphiopus intermontanus................. ........16 <br />FAMILY: Hylidae <br />Canyon Treefrog - Hyla arenicolor...................................................16 <br />Pacific Treefrog - Hyla regilla ..........................................................17 <br />Arizona Treefrog - Hyla wrightorum .................................................17 <br />Burrowing Treefrog - Pternohyla fodiens ..........................................17 <br />Chorus Frog - Pseudacris triseriata ..................................................17 <br />FAMILY: Leptodactylidae <br />Barking Frog - Efeuthero dactylus augusti ...................................... 17 <br />FAMILY: Ranidae <br />Bullfrog - Rana catesbeiana .......................................................... 18 <br />Leopard Frog - Rana pipiens ........................................................ 18 <br />Tarahumara Frog - Rana tarahumarae ........................................... 18 <br />FAMILY: Chelydridae <br />Yellow Mud Turtle - Kinosternon flavescens .....................................19 <br />Sonora Mud Turtle - Kinosternon sonoriense............................ ....... 19 <br />4