Phrynus is a genus of whip spiders found in tropical and subtropical regions, mostly in the new world.

Like other species of the order Amblypygi, species of the genus Phrynus are dorso-ventrally flattened arachnids with elongate, antenniform front legs used to navigate their environment and communicate with conspecifics.

[2] Individuals capture prey using raptorial pedipalps.

Phrynus species vary in size, from the small Phrynus marginemaculatus to the larger Phrynus longipes.

[3] Phrynus is a New World genus, found from the southern United States to northern South America; the sole exception is Phrynus exsul from Indonesia.