They rarely bite if threatened but can grab fingers with their pedipalps, resulting in thorn-like puncture-injuries.

As of 2026, five families, 18 genera, and around 280 species had been discovered and described. They are found in tropical and subtropical regions worldwide, mainly in warm and humid environments. They like to stay protected and hidden within leaf litter, caves, or underneath bark. Some species are subterranean; all are