Holosiro acaroides is a species of mite harvestman in the family Sironidae.

[1][2] It is found in North America, specifically USA in the states of Washington, Oregon, & California.

[1][3][4][5] The species Holosiro acaroides was described by Ewing, 1923.

The species was revised as Siro acaroides (Ewing, 1923) in Newell 1947 and followed by many authors; but was later restored to its original name combination by Karaman 2022.