Number of Genera: 2 or 3 – Cycloramphus, Thoropa , and Zachaenus
Number of Species: 34 or 36
The family Cycloramphidae is found in only Southeastern Brazil. The placement of the genus Zachaenus is questioned by some sources. Some have it in the family, some don’t.
The genus Cycloramphus is sometimes known as the Button Frogs.
The genus Thoropa is known as the River Frogs.
The genus Zachaenus is called the Bug Eyed Frogs.