Spinomantis aglavei is a species of frog in the mantellid subfamily Mantellinae, endemic to Madagascar.

This species was originally described in the genus Rhacophorus.

[3] Dubois made this species the type species of the subgenus Spinomantis,[4] which was elevated to genus-level in 2006.

[5] Oskar Boettger described Rhacophorus sikorae in 1913, but this name was considered a junior synonym of Spinomantis aglavei by Barbour and Loveridge in 1946[6] and all subsequent works.

This species occurs in subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, and swamps.