Othelosoma flavescens, the yellowish flatworm, is a species of land planarian in the family Microplaninae endemic to South Africa.

[1] Othelosoma flavescens generally reaches up to 55 mm long,[2] but when creeping, can reach 80 mm.

A brown midline on the dorsal side runs from the back end to around 6–8 mm from the front.

The creeping sole is a whitish color.

This flatworm- (or platyhelminth-) related article is a stub.