Cethegus is a genus of mygalomorph spiders in the curtain-web family Euagridae. It is endemic to Australia and was first described by Tamerlan Thorell in 1881.
Species the genus contained twelve species from New South Wales (NSW), Queensland (QLD), South Australia (SA) or Western Australia (WA):
Cethegus barraba Raven, 1984 – NSW Cethegus broomi (Hogg, 1901) – NSW Cethegus colemani Raven, 1984 – QLD Cethegus daemeli Raven, 1984 – QLD Cethegus elegans Raven, 1984 – QLD Cethegus fugax (Simon, 1908) – SA, WA Cethegus hanni Raven, 1984 – QLD Cethegus ischnotheloides Raven, 1985 – SA Cethegus lugubris Thorell, 1881 (type) – QLD Cethegus multispinosus Raven, 1984 – QLD Cethegus pallipes Raven, 1984 – QLD Cethegus robustus Raven, 1984 – QLD
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