Chenistonia trevallynia is a species of mygalomorph spider in the Anamidae family. It is endemic to Australia. It was described in 1926 by Australian arachnologist Vernon Victor Hickman.
The species occurs in Tasmania. The type locality is Trevallyn, a suburb of Launceston in the north of the state.
The spiders are fossorial, terrestrial predators. They construct silk-lined tubes in burrows beneath logs and rocks in wet situations.