Idiosoma sigillatum

Idiosoma sigillatum is a species of mygalomorph spider in the Idiopidae family. It is endemic to Australia. It was described in 1870 by British arachnologist Octavius Pickard-Cambridge.

Distribution and habitat
The species occurs in south-west Western Australia, in the Swan Coastal Plain and Jarrah Forest bioregions, including the Darling Scarp and Rottnest Island, in open forest habitats. The type locality is Swan River (Perth).

Behaviour
The spiders are fossorial, terrestrial predators. They construct burrows with trapdoors in plant litter on sandy-gravel soils, with a fan of twig-lines around the entrance.