Nannophrys is a genus of frogs endemic to Sri Lanka. It used to be placed in the large frog family Ranidae but a phylogenetic study was undertaken using DNA sequences and it is now included in the family Dicroglossidae. They are sometimes known under the common name streamlined frogs.

Ecology Nannophrys species are flat-bodied frogs that are adapted to live among narrow, horizontal rock crevices near clear-water streams.

Species Four species are placed in the genus: Nannophrys ceylonensis Günther, 1869 †Nannophrys guentheri Boulenger, 1882 (extinct) Nannophrys marmorata Kirtisinghe, 1946 Nannophrys naeyakai Fernando, Wickramasinghe, and Rodrigo, 2007

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