Urodacus lunatus is a rare species of burrowing scorpion in the family Urodacidae. It is endemic to the northern part of western Australia and was described in 2023.
Urodacus lunatus cannot be distinguished from Urodacus uncinus with external morphology and examination of genitalia is required.
The species is known from 9 specimens from 3 locations in Pilbara shown by the green circles on the range map. These locations only make up around 50 km<sup>2</sup> (20 mi<sup>2</sup>), which means it is a short-range endemic species, as it is likely distributed in under 10,000 km<sup>2</sup> (3860 mi<sup>2</sup>).
It is likely fossorial but this is based on the similar species U. uncinus. It is hypothesized that the males travel longer distances to mate, as this is common in the genus.
The specific epithet "lunatus" refers to the crescent or lunate shape of the laminar hook in the hemispermatophore, a part of the genitalia.