Domitius beaticus is an araneomorph spider species of the family Nesticidae.

The species was first described in 2011 by Alberto López-Pancorbo and Carles Ribera as Nesticus baeticus.

[1] In 2018, it was transferred by Carles Ribera, alongside six other species,[4] to the new genus Domitius.

[1] Both sexes are yellowish with exception of the opisthosoma, which is greyish with darker patches.

n., a new troglobitic spider species from south-west Europe (Araneae, Nesticidae)".