Mesalina arnoldi is a species of sand-dwelling lizard in the family Lacertidae. The species is endemic to Yemen.
The specific name, arnoldi, is in honor of British herpetologist E. Nicholas "Nick" Arnold.
The preferred habitat of M. arnoldi is sparsely-vegetated rocky plateaus at elevations of 1,300–2,800 m (4,300–9,200 ft).
