tailed frog

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Either of two small frogs (Ascaphus truei or A. montanus) of western North America, having a taillike copulatory organ in the male.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A family of frogs in the Ascaphidae family, having distinctive tails
• noun The coastal tailed frog

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun western North American frog with a taillike copulatory organ