Vosmer's writhing skink (Riopa vosmaeri) is a species of skink, a lizard in the family Scincidae.

The species is endemic to India.

The specific name, vosmaeri, is in honor of Dutch naturalist Arnout Vosmaer (1720–1799).

A second specimen was discovered in 2009 in an open scrub jungle in rocky habitat near Jaggayapet, Andhra Pradesh, some 170 years after the collection of the holotype.

However, L. vosmaerii has five digits on each front foot, where R. lineata has only four.