Arbasus is a monotypic genus of armoured harvestmen in the family Buemarinoidae with one described species (as of 2023) Arbasus caecus.

[1][2] It is found in the Pyrenees of southern France.

[1][3][4][5] The genus was originally placed in the family Travuniidae, but later transferred to Cladonychiidae by Derkarabetian et al.

[6] It has been subsequently transferred to Buemarinoidae by Karaman (2023).

[7] These species belong to the genus Arbasus: This harvestmen-related article is a stub.