Surazomus uarini n. sp. is described and illustrated based on specimens collected by beating on understory vegetation of Amazonian “terra firme” upland rain forests. A new cuticular structure, possibly a gland opening, is described on the female tarsus I and terminal flagellum. A putatively homologous structure is reported from the same body parts in an undescribed species of Rowlandius Reddell and Cokendolpher 1995; Stenochrus portoricensis Chamberlin 1922; Mastigoproctus maximus (Tarnani 1889); and Thelyphonellus amazonicus (Butler 1872); suggesting a new synapomorphy for the clade Uropygi (i.e., Schizomida Thelyphonida).