Hylodes regius, also known as the royal tree toad, is a species of frog in the family Hylodidae. The specific name regius is not explained in the original species description but probably refers to the yellow and purple-red (colors with royal associations) markings in male Hylodes regius. It is endemic to the Itatiaia Mountains in Minas Gerais, Brazil. After more than three decades without observations, it was detected again in 2012.

...