Arhesiro sonoma is a species of mite harvestman in the family Sironidae (as of 2023).

[1][2] It is found in North America, specifically USA, California, Sonoma County.

[1][3][4][5] The genus Arhesiro was described by Karaman, 2022, with the type species Siro clousi Giribet & Shear, 2010.

[6] Before then, both this species and that other were previously placed in Siro.