"Meet the Brazilian Flea Toad: The World's Tiniest Vertebrate"

Researchers have confirmed that the flea toad, Brachycephalus pulex, found in Brazil, is the tiniest frog and vertebrate species in the world, measuring an average of 7.1 millimeters for adult males. This discovery challenges the previous record held by Papua New Guinea's Paedophryne amauensis. The extremely small size of these frogs presents physical limitations for vertebrates, such as the inability to fit enough cell types to create vital organs and the loss of common frog features. Despite these limitations, the flea toads continue to thrive in their mountainous forest habitats.