A new Cyclodorippoidea crab species, Cymonomoides fitoi, of the family Cymonomidae Bouvier, is described and illustrated based on specimens collected from the upper slope region off the Caribbean coast of Colombia. This new species is the fourth known in the genus Cymonomoides Tavares, and the third from the western Atlantic. This new species is compared to its congeners, from which it is distinguished by features of the ocular pedimcles, dorsal surface of the carapace, and spination on the dactyls of fourth and lifth