Flea toad may be world's smallest vertebrate

A trio of biologists at Universidade Estadual de Santa Cruz, in Brazil, has verified that a tiny frog, Brachycephalus pulex, also known as the Brazilian flea toad, which is found only in southern Brazil, is not only the world's smallest amphibian, it is also the world's smallest vertebrate. Their paper is published in the journal Zoologica Scripta.