nuclear transfer methods to produce an embryo that can survive to the tadpole stage. "We do expect to get this guy hopping again," says UNSW researcher Mike Archer. The scientists from the University of Newcastle have also reported successful freezing and thawing (cryopreservation) of totipotent amphibian embryonic cells, which along with sperm cryopreservation provides the essential "proof of concept" for the use of cryostorage as a genome bank for threatened amphibians and also other animals. References Further reading Barker, J.; Grigg, G. C.; Tyler, M. J. (1995): A Field Guide to Australian Frogs. Surrey Beatty & Sons. Pough, F. H.; Andrews, R. M.; Cadle, J. E.; Crump, M.; Savitsky, A. H. & Wells, K. D. (2003): Herpetology (3rd ed.). Pearson Prentice Hall, Upper Saddle River, New Jersey. Ryan, M. (ed.) (2003): Wildlife of Greater Brisbane. Queensland Museum, Brisbane. Ryan, M. & Burwell, C. (eds.) (2003): Wildlife of Tropical North Queensland. Queensland Museum, Brisbane. Tyler, M. J. (1984): There's a frog in my throat/stomach. William Collins Pty Ltd, Sydney. Tyler, M. J. (1994): Australian Frogs – A Natural History. Reed Books. Zug, G. E.; Vitt, L. J. & Caldwell, J. P. (2001): Herpetology (2nd ed.). Academic Press, San Diego, California. External links Animal Diversity Web – Rheobatrachus silus (Accessed 2006/08/19) American Museum of Natural History – Rheobatrachus (Accessed 2006/08/19) Extinct amphibians Amphibians of Queensland Myobatrachidae Extinct animals of Australia Amphibian extinctions since 1500 EPBC Act extinct biota Nature Conservation Act endangered biota Frogs of Australia Amphibians described in 1973