Summary[edit] Description: English: Cryptobatrachus boulengeri Ruthven, 1916. Original illustration from Ruthven, A. G. 1916. A new genus and species of amphibian of the family Cystignathidae. Occasional Papers of the Museum of Zoology, University of Michigan 33: 1–4. Date: 18 January 2014, 17:52:06. Source: Ruthven, A. G. 1916. A new genus and species of amphibian of the family Cystignathidae. Occasional Papers of the Museum of Zoology, University of Michigan 33: 1–4. http://deepblue.lib.umich.edu/bitstream/handle/2027.42/56472/OP033.pdf. Author: Ruthven, A. G.
