R. vosmaerii resembles L. lineata. However, L. vosmaerii has five digits on each front foot, where R. lineata has only four.
R. vosmaerii is found in India. Originally it was known only from the holotype. 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.