Hey now that's a thought...found this:

2. Hyperolius f. lamtoensis Schiøtz 1965. – Characterised by phase F having a white ventrum with red marbling. No black pigmentation. The red marbling disappears after preservation.
Côte d’Ivoire.

3. Hyperolius f. burtoni (Boulenger 1883). – Characterised by phase F having a white ventrum with irregular black spots and streaks. Red and yellow markings on limbs and feet.
From Ghana to Nigeria.

Number 2 and 3 match as the frog in question has a definite white ventral area...however number 2 says Ivory Coast and number 3 says Ghana to Nigeria so you'd roll with number 3? Good thinking Paplan

Don't forget... a lot of herps are caught in one place, and sent to the export center which could be far away from the point of collection. On top of that, I understand that Hyperolius spp. is extremely variable across the continent.