Cryptothylax Laurent and Combaz, 1950, Rev. Zool. Bot. Afr., 43: 276. Type species: Hylambates greshoffii Schilthuis, 1889, by original designation.
Wax Frogs (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 66).
Forest swamps and waterways of the Congo Basin, north to Uele Province (Dem. Rep. Congo) and west to Cameroon.
See account by Schiøtz, 1999, Treefrogs Afr.: 90-91. Pyron and Wiens, 2011, Mol. Phylogenet. Evol., 61: 543-583, in their study of Genbank sequences, suggested this taxon to be the sister of their remaining hyperoliid exemplars.
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