The REVIZEE Benthos Program investigated the fauna of benthos from off Brazilian coast. The samples were collected from October, 1997 to June, 2002. The studied material was found in two stations, off Bahia State, central Brazilian coast. A new deepsea lysianassoid species of the family Uristidae, Stephonyx uncinatus sp. nov. is described herein. A key for the world species of Stephonyx is presented.