''Arbasus'' is a genus of armoured harvestmen in the family

Cladonychiidae The Cladonychiidae are a small family of harvestman with about 33 described species, within the suborder Laniatores. Description Members of this family range from less than two to about four millimeters in body length, with robust, spined pedipa ...

. There is one described species in ''Arbasus'', ''A. caecus''. It is found in the Pyrenees of southern France.

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