The Triaenonychidae are a family of harvestmen with about 120 genera and more than 440 described species.

Some species in the subfamily Adaeinae are almost 10 mm (0.39 in) long.

[1] Triaenonychidae are found in North and South America, Japan and Korea, Australia and New Zealand, and Madagascar.

The genera from the Australian region are considered Triaenonychidae sensu stricto, and may include the strange Synthetonychiidae; the northern species should be grouped with Travuniidae.

[1] The name of the type genus Triaenonyx is combined from Ancient Greek τρίαινα (triaina, "trident, fish spear") and ὄνυξ (onyx, "claw").