Nectophrynoides is a genus of true toads endemic to Tanzania. Some species in it have a most unusual reproductive feature. They are viviparous: the fertilization is internal, and the young are born alive. They are the only toads in the world that do not lay eggs.
Frost, Darrel R. 2007. Amphibian Species of the World: an Online Reference. Version 5.1 (10 October, 2007). Electronic Database accessible at http://research.amnh.org/herpetology/amphibia/index.php. American Museum of Natural History, New York, USA. Nectophrynoides access date=2008-04-14