Gaius mainae

Gaius mainae is a species of mygalomorph spider in the Idiopidae family. It is endemic to Australia. It was described in 2018 by Australian arachnologists Michael Rix, Robert Raven and Mark Harvey.

Distribution and habitat
The species occurs in Western Australia in the Coolgardie and Mallee bioregions. The type locality is Grass Patch, some 80 km north of Esperance.