Cethegus robustusCethegus robustus is a species of mygalomorph spider in the family Euagridae. It is endemic to Australia. It was first described in 1984 by Australian arachnologist Robert Raven.Distribution and habitatThe species occurs in Far North Queensland in open forest habitats. The type locality is Chillagoe.BehaviourThe spiders are fossorial, terrestrial predators. They construct curtain-like silk webs over their burrows.