Hylodes dactylocinus is a species of frog in the family Hylodidae.

[2] It is endemic to Serra do Itatins, in the São Paulo state, southeastern Brazil.

[4] Hylodes dactylocinus are diurnal sit-and-wait predators, using emerged logs and rocks as their standing points.

[4] The species' natural habitats are small streams in primary and secondary forests.

Active by day, males can be observed calling from rocks along streams.