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Brachycephalidae
Range: forests of southeastern Brazil and northern Argentina.
Species: 52 Genera: 2 Representatives of this family are among the smallest amphibians; their body length usually does not exceed 10.2-54 mm. A number of species have bright coloration and poisonous glands; some have a bony plate on the back. Females are often larger than males. Brachycephalus ephippium Brachycephalus nodoterga Ischnocnema guentheri Ischnocnema guentheri Sources: 1.
Amphibian Species Lists 2.
Amphibian Species of the World 3. https://tolweb.org