Hyperolius wermuthi is a species of frog in the family Hyperoliidae.It is found in Ivory Coast, southern Guinea, and Liberia. The correct name for this species is likely Hyperolius soror. It is so similar to Hyperolius fusciventris that it has likely been overlooked elsewhere in West Africa. Common name Wermuth's reed frog has been coined for this species.
Males measure 18–23 mm (0.71–0.91 in) and females 22–29 mm (0.87–1.14 in) in snout–vent length. There are two distinct colour phases, "J" and "F", although also intermediate forms exist. Juveniles and many mature males have phase J whereas mature females and some mature males have phase F. Phase J individuals are brownish to green with paired light dorsolateral lines or an hourglass pattern. Phase F is often colorful and variable and show a red canthal stripe that is characteristic to this species. The ventrum is transparent bluish green.
