9 (see text) Microphryne Peters, 1873 Engystomops is a genus of frogs in the family Leptodactylidae.

They are native to the Americas from southern Mexico south to the Amazon Basin.

This group was split off in 2005 on the basis of characters such as basic morphology and vocalizations, as well as allozyme and other genetic analysis.

[5] Frogs of this genus have been researched in studies of sexual selection and communication in animals.

[6] It was previously believed that a female's choice in Engystomops benefited through indirect exclusion but it is now believed that the extra male activity while nesting influences the fitness of the female directly.