Proshermacha villosa is a species of mygalomorph spider in the Anamidae family. It is endemic to Australia. It was described in 1918 by Australian arachnologists William Joseph Rainbow and Robert Henry Pulleine.
The species occurs in south-west Western Australia, in tall open forest. The type locality is Carlotta Brook, Nannup.
The spiders are arboreal or fossorial, terrestrial predators. They inhabit karri forest and construct shallow burrows or silk tubes for shelter, sometimes beneath bark.