Physalaemus

(from the article `Anura`) Some frogs in the families Leptodactylidae, Ranidae, and Microhylidae build froth nests. The small, toadlike leptodactylids of the genus Physalaemus ...
Found on http://www.britannica.com/eb/a-z/p/62

Physalaemus

Physalaemus is a large genus of leptodactylid frogs. These frogs, sometimes known as dwarf frogs or foam frogs, are found in South America. It is very similar to Leptodactylus, a close relative, and indeed the recently rescribed Leptodactylus lauramiriamae is in some aspects intermediate between them. There are 46 species: ...
Found on http://en.wikipedia.org/wiki/Physalaemus
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